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       # MOTOROLA, INC.
       
          V.3400
       
          Modem Type             Data (synchronous/asynchronous)/Fax     
          Maximum Data Rate      28.8Kbps                                
          Maximum Fax Rate       14.4Kbps                                
          Data Bus               External                                
          Fax Class              Class I                                 
          Data Modulation        Bell 103A/212A                          
          Protocol                                                       
                                 ITU-T V.21, V.22, V.22bis, V.32,        
                                 V.32bis, V.33, V.34                     
          Fax Modulation         ITU-T V.17, V.21CH2, V.27ter, V.29      
          Protocol               
          Error                  MNP5, V.42, V.42bis                     
          Correction/Compression 
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |      Purpose       | Location |     Purpose     | Location |
          |--------------------+----------+-----------------+----------|
          | YES button         |   BT1    | Leased line out |   CN2    |
          |--------------------+----------+-----------------+----------|
          | NO button          |   BT2    | RS-232/422      |   CN3    |
          |--------------------+----------+-----------------+----------|
          | TALK/DATA button   |   BT3    | Fuse            |   FUSE   |
          |--------------------+----------+-----------------+----------|
          | Switched line out  |   CN1    | Power switch    |   SW1    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          |  LED  |  Color  | Status  |           Condition            |
          |-------+---------+---------+--------------------------------|
          |  TR   |   Red   |   On    |       DTR signal is high       |
          |-------+---------+---------+--------------------------------|
          |  TR   |   Red   |   Off   |       DTR signal is low        |
          |-------+---------+---------+--------------------------------|
          |  CS   |   Red   |   On    |       CTS signal is high       |
          |-------+---------+---------+--------------------------------|
          |  CS   |   Red   |   Off   |       CTS signal is low        |
          |-------+---------+---------+--------------------------------|
          |  RS   |   Red   |   On    |       RTS signal is high       |
          |-------+---------+---------+--------------------------------|
          |  RS   |   Red   |   Off   |       RTS signal is low        |
          |-------+---------+---------+--------------------------------|
          |  CD   |   Red   |   On    |    Carrier signal detected     |
          |-------+---------+---------+--------------------------------|
          |  CD   |   Red   |   Off   |  Carrier signal not detected   |
          |-------+---------+---------+--------------------------------|
          |  RD   |   Red   |   On    |    Modem is receiving data     |
          |-------+---------+---------+--------------------------------|
          |  RD   |   Red   |   Off   |  Modem is not receiving data   |
          |-------+---------+---------+--------------------------------|
          |  TD   |   Red   |   On    |   Modem is transmitting data   |
          |-------+---------+---------+--------------------------------|
          |  TD   |   Red   |   Off   | Modem is not transmitting data |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                   ANSWER/ORIGINATE MODE                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *ORn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *OR0<CR>                                 |
          |--------------+---------------------------------------------|
          | Description: | Selects whether the modem is in answer or   |
          |              | originate mode.                             |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » *OR0       | Modem is in originate mode.                 |
          |--------------+---------------------------------------------|
          | *OR1         | Modem is in answer mode.                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    AUTO-ANSWER OVERRIDE                    |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *IC [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT *IC<CR>                                  |
          |--------------+---------------------------------------------|
          | Description: | Instructs the modem to ignore the incoming  |
          |              | call, if the modem is set to automatically  |
          |              | answer.                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 AUTODIALING STORED NUMBER                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *AUn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *AU4 *CN4,1(303)443-3388<CR>             |
          |--------------+---------------------------------------------|
          | Description: | Sets the autodialing function to dial the   |
          |              | number stored in memory location n.         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              AUTO-RELIABLE FALLBACK CHARACTER              |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %An [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT%A20<CR>                                  |
          |--------------+---------------------------------------------|
          | Default:     | 19                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character used as the              |
          |              | auto-reliable fallback character. %A0 will  |
          |              | disable this function.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              AUTO-RELIABLE FALLBACK CHARACTER              |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S64=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | ATS64=20<CR>                                |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character used as the              |
          |              | auto-reliable fallback character. S64=0     |
          |              | will disable this function.                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          AUTO-RELIABLE TIME BUFFER CONFIGURATION           |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT \C1 &W<CR>                               |
          |--------------+---------------------------------------------|
          | Description: | Controls the handling of incoming data      |
          |              | during auto-reliable time period.           |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » \C0        | Data is discarded.                          |
          |--------------+---------------------------------------------|
          | \C1          | Data is buffered.                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        AUTO-RETRAIN                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT %En                                      |
          |--------------+---------------------------------------------|
          | Example:     | AT %E1 *MM12<CR>                            |
          |--------------+---------------------------------------------|
          | Description: | Selects auto-retrain mode.                  |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | %E0          | Auto-retrain disabled.                      |
          |--------------+---------------------------------------------|
          | » %E1        | Auto-retrain enabled.                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S14                   |
          |------------------------------------------------------------|
          | Format        | AT [cmds] S14=n [cmds]                     |
          |---------------+--------------------------------------------|
          | Example:      | ATS14=40<CR>                               |
          |---------------+--------------------------------------------|
          | Default:      | 138                                        |
          |---------------+--------------------------------------------|
          | Range:        | 0 - 190                                    |
          |---------------+--------------------------------------------|
          | Unit:         | Bit-mapped                                 |
          |---------------+--------------------------------------------|
          | Description:  | Controls command echo, result codes,       |
          |               | dialing mode, and answer/originate mode.   |
          |------------------------------------------------------------|
          |   Bit   | Value   |                Function                |
          |---------+---------+----------------------------------------|
          |    0    | 0       | Not used.                              |
          |---------+---------+----------------------------------------|
          |    1    | 0 » 1   | Command echo off.                      |
          |         |         |                                        |
          |         |         | Command echo on.                       |
          |---------+---------+----------------------------------------|
          |    2    | » 0 1   | Result codes enabled.                  |
          |         |         |                                        |
          |         |         | Result codes disabled.                 |
          |---------+---------+----------------------------------------|
          |    3    | 0 » 1   | Numeric result codes.                  |
          |         |         |                                        |
          |         |         | Verbose result codes.                  |
          |---------+---------+----------------------------------------|
          |    4    | » 1     | Not used.                              |
          |---------+---------+----------------------------------------|
          |    5    | » 0 1   | Tone dialing selected.                 |
          |         |         |                                        |
          |         |         | Pulse dialing selected.                |
          |---------+---------+----------------------------------------|
          |    6    | 0       | Not used.                              |
          |---------+---------+----------------------------------------|
          |    7    | 0 » 1   | Answer mode selected.                  |
          |         |         |                                        |
          |         |         | Originate mode selected.               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S21                   |
          |------------------------------------------------------------|
          | Format         | AT [cmds] S21=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Example:       | ATS21=1<CR>                               |
          |----------------+-------------------------------------------|
          | Default:       | 132                                       |
          |----------------+-------------------------------------------|
          | Range:         | 0 - 255                                   |
          |----------------+-------------------------------------------|
          | Unit:          | Bit-mapped                                |
          |----------------+-------------------------------------------|
          | Description:   | Controls low DTR action, DCD signal, and  |
          |                | the Long Space Disconnect function.       |
          |----------------+-------------------------------------------|
          | Note:          | Be aware that the bits are out of order.  |
          |------------------------------------------------------------|
          |   Bit    | Value |                Function                 |
          |----------+-------+-----------------------------------------|
          |   6, 0   | » 00  | DSR forced high.                        |
          |          | 01 10 |                                         |
          |          | 11    | DSR normal, except forced low on        |
          |          |       | disconnect.                             |
          |          |       |                                         |
          |          |       | DSR normal.                             |
          |          |       |                                         |
          |          |       | DSR follows OH.                         |
          |----------+-------+-----------------------------------------|
          |   5, 1   | » 00  | CD forced high.                         |
          |          | 01 10 |                                         |
          |          | 11    | CD forced high except during            |
          |          |       | disconnect.                             |
          |          |       |                                         |
          |          |       | CD normal.                              |
          |          |       |                                         |
          |          |       | CD follows remote RTS signal.           |
          |----------+-------+-----------------------------------------|
          |    2     | 0 » 1 | CTS normal.                             |
          |          |       |                                         |
          |          |       | CTS forced high.                        |
          |----------+-------+-----------------------------------------|
          |   4, 3   | » 00  | DTR signal ignored.                     |
          |          | 01 10 |                                         |
          |          | 11    | Modem goes to command mode on low DTR.  |
          |          |       |                                         |
          |          |       | Modem disconnects on low DTR.           |
          |          |       |                                         |
          |          |       | Modem resets on low DTR.                |
          |----------+-------+-----------------------------------------|
          |    7     | 0 » 1 | Long Space Disconnect function          |
          |          |       | disabled.                               |
          |          |       |                                         |
          |          |       | Long Space Disconnect function enabled. |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S22                   |
          |------------------------------------------------------------|
          | Format         | AT [cmds] S22=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Example:       | ATS22=114<CR>                             |
          |----------------+-------------------------------------------|
          | Default:       | 70                                        |
          |----------------+-------------------------------------------|
          | Range:         | 0 - 255                                   |
          |----------------+-------------------------------------------|
          | Unit:          | Bit-mapped                                |
          |----------------+-------------------------------------------|
          | Description:   | Controls volume and speaker settings,     |
          |                | result codes, and make/break pulse ratio. |
          |------------------------------------------------------------|
          |    Bit    | Value  |               Function                |
          |-----------+--------+---------------------------------------|
          |   1, 0    | 00 01  | Lowest volume setting.                |
          |           | » 10   |                                       |
          |           | 11     | Low volume setting.                   |
          |           |        |                                       |
          |           |        | Medium volume setting                 |
          |           |        |                                       |
          |           |        | Highest volume setting.               |
          |-----------+--------+---------------------------------------|
          |   3, 2    | 00 »   | Speaker disabled.                     |
          |           | 01 10  |                                       |
          |           | 11     | Speaker enabled until carrier signal  |
          |           |        | detected                              |
          |           |        |                                       |
          |           |        | Speaker enabled.                      |
          |           |        |                                       |
          |           |        | Speaker enabled following dialing,    |
          |           |        | then disabled after carrier signal    |
          |           |        | detected.                             |
          |-----------+--------+---------------------------------------|
          |  6, 5 ,4  | 000    | Busy and dialtone detection disabled, |
          |           | 001    | result codes 0-4 enabled.             |
          |           | 010    |                                       |
          |           | 011 »  | Busy and dialtone detection disabled, |
          |           | 100    | result codes 0-5, 10 enabled.         |
          |           |        |                                       |
          |           |        | Busy tone detection disabled,         |
          |           |        | dialtone detection enabled, result    |
          |           |        | codes 0-6, 10 enabled.                |
          |           |        |                                       |
          |           |        | Busy tone detection enabled, dialtone |
          |           |        | detection disabled, result codes 0-5, |
          |           |        | 7, 10 enabled.                        |
          |           |        |                                       |
          |           |        | Busy and dialtone detection enabled,  |
          |           |        | result codes 0-7, 10 enabled.         |
          |-----------+--------+---------------------------------------|
          |     7     | » 0 1  | Pulse dialing at 39/61ms at 10pps.    |
          |           |        |                                       |
          |           |        | Pulse dialing at 33/67ms at 10pps.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S23                   |
          |------------------------------------------------------------|
          | Format         | AT [cmds] S23=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Example:       | ATS23=177<CR>                             |
          |----------------+-------------------------------------------|
          | Default:       | 1                                         |
          |----------------+-------------------------------------------|
          | Range:         | 0 - 129                                   |
          |----------------+-------------------------------------------|
          | Unit:          | Bit-mapped                                |
          |----------------+-------------------------------------------|
          | Description:   | Grants/denies remote digital loopback and |
          |                | sets guard tone.                          |
          |------------------------------------------------------------|
          |   Bit    | Value  |                Function                |
          |----------+--------+----------------------------------------|
          |    0     | 0 » 1  | Remote digital loopback denied.        |
          |          |        |                                        |
          |          |        | Remote digital loopback allowed.       |
          |----------+--------+----------------------------------------|
          |    1     | 0      | Not used.                              |
          |----------+--------+----------------------------------------|
          |    2     | 0      | Not used.                              |
          |----------+--------+----------------------------------------|
          |    3     | 0      | Not used.                              |
          |----------+--------+----------------------------------------|
          |    4     | 0      | Not used.                              |
          |----------+--------+----------------------------------------|
          |    5     | 0      | Not used.                              |
          |----------+--------+----------------------------------------|
          |   7, 6   | » 00   | Guard tone disabled.                   |
          |          | 01 10  |                                        |
          |          |        | Guard tone at 500Hz enabled.           |
          |          |        |                                        |
          |          |        | Guard tone at 1800Hz enabled.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S27                   |
          |------------------------------------------------------------|
          | Format         | AT [cmds] S27=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Example:       | ATS27=9<CR>                               |
          |----------------+-------------------------------------------|
          | Default:       | 9                                         |
          |----------------+-------------------------------------------|
          | Range:         | 0 - 127                                   |
          |----------------+-------------------------------------------|
          | Unit:          | Bit-mapped                                |
          |----------------+-------------------------------------------|
          | Description:   | Selects sync/async mode, line type, clock |
          |                | source, and ITU-T/Bell modes.             |
          |------------------------------------------------------------|
          |   Bit    | Value |                Function                 |
          |----------+-------+-----------------------------------------|
          |   1, 0   | 00 01 | Asynchronous command and data modes.    |
          |          | » 10  |                                         |
          |          | 11    | Asynchronous command, synchronous       |
          |          |       | connect mode.                           |
          |          |       |                                         |
          |          |       | DTR dialing enabled, synchronous        |
          |          |       | connect mode.                           |
          |          |       |                                         |
          |          |       | Manual dialing only, synchronous        |
          |          |       | connect mode.                           |
          |----------+-------+-----------------------------------------|
          |    2     | » 0 1 | Switched line.                          |
          |          |       |                                         |
          |          |       | Leased line.                            |
          |----------+-------+-----------------------------------------|
          |    3     | 0     | Not used.                               |
          |----------+-------+-----------------------------------------|
          |   5, 4   | » 00  | Internal DTE transmit clock source.     |
          |          | 01 10 |                                         |
          |          |       | External DTE transmit clock source.     |
          |          |       |                                         |
          |          |       | Slave DTE transmit clock source.        |
          |----------+-------+-----------------------------------------|
          |    6     | » 0 1 | DTR dialing enabled.                    |
          |          |       |                                         |
          |          |       | DTR dialing disabled.                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S29                   |
          |------------------------------------------------------------|
          | Format         | AT [cmds] S29=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Example:       | ATS29=4<CR>                               |
          |----------------+-------------------------------------------|
          | Default:       | 0                                         |
          |----------------+-------------------------------------------|
          | Range:         | 0 - 135                                   |
          |----------------+-------------------------------------------|
          | Unit:          | Bit-mapped                                |
          |----------------+-------------------------------------------|
          | Description:   | Controls command set, option retaining,   |
          |                | V.32 fast handshaking, and DTE fallback.  |
          |------------------------------------------------------------|
          |   Bit    | Value |                Function                 |
          |----------+-------+-----------------------------------------|
          |    0     | » 0 1 | AT command set enabled.                 |
          |          |       |                                         |
          |          |       | AT command set disabled.                |
          |----------+-------+-----------------------------------------|
          |    1     | » 0 1 | Modem will not reset on disconnect.     |
          |          |       |                                         |
          |          |       | Modem will reset on disconnect.         |
          |----------+-------+-----------------------------------------|
          |    2     | » 0 1 | Normal V.32 handshake sequence.         |
          |          |       |                                         |
          |          |       | Training time is shortened by 2 seconds |
          |          |       | in V.32 and V.32bis modes.              |
          |----------+-------+-----------------------------------------|
          |    3     | 0     | Not used.                               |
          |----------+-------+-----------------------------------------|
          |    4     | 0     | Not used.                               |
          |----------+-------+-----------------------------------------|
          |    5     | 0     | Not used.                               |
          |----------+-------+-----------------------------------------|
          |    6     | 0     | Not used.                               |
          |----------+-------+-----------------------------------------|
          |    7     | » 0 1 | DTR dialing enabled.                    |
          |          |       |                                         |
          |          |       | DTR dialing disabled.                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S32                   |
          |------------------------------------------------------------|
          | Format         | AT [cmds] S32=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Example:       | ATS32=14<CR>                              |
          |----------------+-------------------------------------------|
          | Default:       | 6                                         |
          |----------------+-------------------------------------------|
          | Range:         | 0 - 15                                    |
          |----------------+-------------------------------------------|
          | Unit:          | Bit-mapped                                |
          |----------------+-------------------------------------------|
          | Description:   | Controls line type, disconnect on loss of |
          |                | current, and leased line backup mode.     |
          |------------------------------------------------------------|
          |   Bit    | Value |                Function                 |
          |----------+-------+-----------------------------------------|
          |    0     | » 0 1 | 2-wire leased line.                     |
          |          |       |                                         |
          |          |       | 4-wire leased line.                     |
          |----------+-------+-----------------------------------------|
          |   2, 1   | 00 01 | Do not disconnect on loss of current.   |
          |          | » 11  |                                         |
          |          |       | Disconnect after 8ms if current is      |
          |          |       | lost.                                   |
          |          |       |                                         |
          |          |       | Disconnect after 90ms if current is     |
          |          |       | lost.                                   |
          |----------+-------+-----------------------------------------|
          |    3     | » 0 1 | Modem will restore leased line          |
          |          |       | connection only when modem receives *LB |
          |          |       | or *LD.                                 |
          |          |       |                                         |
          |          |       | Modem will restore leased line          |
          |          |       | connection automatically.               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S60                   |
          |------------------------------------------------------------|
          | Format         | AT [cmds] S60=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Example:       | ATS60=4<CR>                               |
          |----------------+-------------------------------------------|
          | Default:       | 67                                        |
          |----------------+-------------------------------------------|
          | Range:         | 0 - 199                                   |
          |----------------+-------------------------------------------|
          | Unit:          | Bit-mapped                                |
          |----------------+-------------------------------------------|
          | Description:   | Controls auto-retrain, MNP, auto-reliable |
          |                | time buffering, RI signal, and extended   |
          |                | result codes.                             |
          |------------------------------------------------------------|
          |   Bit    | Value |                Function                 |
          |----------+-------+-----------------------------------------|
          |    0     | 0 » 1 | Auto-retrain disabled.                  |
          |          |       |                                         |
          |          |       | Auto-retrain enabled.                   |
          |----------+-------+-----------------------------------------|
          |    1     | 0 » 1 | MNP disabled.                           |
          |          |       |                                         |
          |          |       | MNP enabled.                            |
          |----------+-------+-----------------------------------------|
          |    2     | » 0 1 | Data is discarded during auto-relaible  |
          |          |       | time.                                   |
          |          |       |                                         |
          |          |       | Data is buffered during auto-relaible   |
          |          |       | time.                                   |
          |----------+-------+-----------------------------------------|
          |  5 - 3   | 0     | Not used.                               |
          |----------+-------+-----------------------------------------|
          |    6     | 0 » 1 | RI signal high during rings, and forced |
          |          |       | high for duration of call.              |
          |          |       |                                         |
          |          |       | RI signal high during rings only.       |
          |----------+-------+-----------------------------------------|
          |    7     | » 0 1 | Extended result codes disabled.         |
          |          |       |                                         |
          |          |       | Extended result codes enabled.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S70                   |
          |------------------------------------------------------------|
          | Format          | AT [cmds] S70=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Example:        | ATS70=7<CR>                              |
          |-----------------+------------------------------------------|
          | Default:        | 15                                       |
          |-----------------+------------------------------------------|
          | Range:          | 0 - 15                                   |
          |-----------------+------------------------------------------|
          | Unit:           | Bit-mapped                               |
          |-----------------+------------------------------------------|
          | Description:    | Controls connect mode and V.42           |
          |                 | negotiation mode.                        |
          |------------------------------------------------------------|
          |    Bit     | Value |               Function                |
          |------------+-------+---------------------------------------|
          |  2, 1, 0   | 000   | Normal mode enabled.                  |
          |            | 001   |                                       |
          |            | 010   | Direct mode enabled.                  |
          |            | 011   |                                       |
          |            | 100   | MNP mode only enabled.                |
          |            | 101   |                                       |
          |            | 110 » | MNP mode with fallback to normal mode |
          |            | 111   | enabled.                              |
          |            |       |                                       |
          |            |       | LAP-M mode only enabled.              |
          |            |       |                                       |
          |            |       | LAP-M mode with fallback to normal    |
          |            |       | mode enabled.                         |
          |            |       |                                       |
          |            |       | LAP-M mode with fallback to MNP       |
          |            |       | enabled.                              |
          |            |       |                                       |
          |            |       | LAP-M mode with fallback to MNP and   |
          |            |       | normal modes enabled.                 |
          |------------+-------+---------------------------------------|
          |     3      | 0 » 1 | Normal V.42 handshaking enabled.      |
          |            |       |                                       |
          |            |       | Fast V.42 handshaking enabled.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S72                   |
          |------------------------------------------------------------|
          | Format          | AT [cmds] S72=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Example:        | ATS72=7<CR>                              |
          |-----------------+------------------------------------------|
          | Default:        | 0                                        |
          |-----------------+------------------------------------------|
          | Range:          | 0 - 137                                  |
          |-----------------+------------------------------------------|
          | Unit:           | Bit-mapped                               |
          |-----------------+------------------------------------------|
          | Description:    | Controls serial port lock, CTS signal,   |
          |                 | and autocallback function.               |
          |------------------------------------------------------------|
          |    Bit    | Value |                Function                |
          |-----------+-------+----------------------------------------|
          |     0     | » 0 1 | Serial speed locked.                   |
          |           |       |                                        |
          |           |       | Serial speed follows connect speed.    |
          |-----------+-------+----------------------------------------|
          |   2 - 1   | 0     | Not used.                              |
          |-----------+-------+----------------------------------------|
          |     3     | » 0 1 | CTS normal.                            |
          |           |       |                                        |
          |           |       | CTS follows CD.                        |
          |-----------+-------+----------------------------------------|
          |   6 - 4   | 0     | Not used.                              |
          |-----------+-------+----------------------------------------|
          |     7     | » 0 1 | Autocallback disabled.                 |
          |           |       |                                        |
          |           |       | Autocallback enabled. The modem, upon  |
          |           |       | detecting an incoming call, will dial  |
          |           |       | the default number and connect with it |
          |           |       | instead of the incoming call.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S84                   |
          |------------------------------------------------------------|
          | Format        | AT [cmds] S84=n [cmds]                     |
          |---------------+--------------------------------------------|
          | Example:      | ATS84=7<CR>                                |
          |---------------+--------------------------------------------|
          | Default:      | 0                                          |
          |---------------+--------------------------------------------|
          | Range:        | 0 - 93                                     |
          |---------------+--------------------------------------------|
          | Unit:         | Bit-mapped                                 |
          |---------------+--------------------------------------------|
          | Description:  | Controls disconnect during handshaking,    |
          |               | V.22 fallback, answerback, dial backup     |
          |               | trigger, and frame tracking.               |
          |------------------------------------------------------------|
          |   Bit   | Value |                 Function                 |
          |---------+-------+------------------------------------------|
          |    0    | » 0 1 | Disconnect if key is pressed during      |
          |         |       | handshaking.                             |
          |         |       |                                          |
          |         |       | Do not disconnect if key is pressed      |
          |         |       | during handshaking.                      |
          |---------+-------+------------------------------------------|
          |    1    | 0     | Not used.                                |
          |---------+-------+------------------------------------------|
          |    2    | » 0 1 | Normal fallback to V.22.                 |
          |         |       |                                          |
          |         |       | Fast fallback to V.22.                   |
          |---------+-------+------------------------------------------|
          |    3    | » 0 1 | Normal answerback.                       |
          |         |       |                                          |
          |         |       | Fast answerback.                         |
          |---------+-------+------------------------------------------|
          |    4    | » 0 1 | DTR signal must go from low to high four |
          |         |       | times for dial backup to occur.          |
          |         |       |                                          |
          |         |       | DTR signal must go from low to high once |
          |         |       | for dial backup to occur.                |
          |---------+-------+------------------------------------------|
          |    5    | 0     | Not used.                                |
          |---------+-------+------------------------------------------|
          |    6    | » 0 1 | Frame tracking disabled.                 |
          |         |       |                                          |
          |         |       | Frame tracking enabled.                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         BREAK SEND                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT \B50 O<CR>                               |
          |--------------+---------------------------------------------|
          | Default:     | 35                                          |
          |--------------+---------------------------------------------|
          | Range:       | 1-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 20ms                                        |
          |--------------+---------------------------------------------|
          | Description: | Sends break to modem.                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        BREAK LENGTH                        |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S79=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | ATS79=20<CR>                                |
          |--------------+---------------------------------------------|
          | Default:     | 35                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | 20 ms                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of breaks sent from DCE to  |
          |              | DTE.                                        |
          +------------------------------------------------------------+
       
         +----------------------------------------------------------------+
         |                           BREAK TYPE                           |
         |----------------------------------------------------------------|
         |Type:             |Configuration                                |
         |------------------+---------------------------------------------|
         |Format:           |AT [cmds] \Kn [cmds]                         |
         |------------------+---------------------------------------------|
         |Example:          |AT \K1 <CR>                                  |
         |------------------+---------------------------------------------|
         |Description:      |Configures action of break signal.           |
         |----------------------------------------------------------------|
         | Command |Break from DTE | Break from |   Modem    | Break from |
         |         |               |    DTE     |receives \B |remote modem|
         |         |Reliable/Normal|            |            |            |
         |         |     mode      |Direct mode |            |            |
         |---------+---------------+------------+------------+------------|
         |\K0      |Enter command  |Send break  |Buffers     |Buffers     |
         |         |mode, do not   |to remote   |cleared and |cleared and |
         |         |send break to  |modem       |break sent  |break sent  |
         |         |remote modem.  |immediately,|to remote   |to DTE.     |
         |         |               |then enter  |modem.      |            |
         |         |               |command     |            |            |
         |         |               |mode.       |            |            |
         |---------+---------------+------------+------------+------------|
         |\K1      |Buffers cleared|Send break  |Buffers     |Buffers     |
         |         |and break sent |to remote   |cleared and |cleared and |
         |         |to remote      |modem       |break sent  |break sent  |
         |         |modem.         |immediately.|to remote   |to DTE.     |
         |         |               |            |modem.      |            |
         |---------+---------------+------------+------------+------------|
         |\K2      |Enter command  |Send break  |Send break  |Send break  |
         |         |mode, do not   |to remote   |to remote   |to DTE      |
         |         |send break to  |modem       |modem       |immediately.|
         |         |remote modem.  |immediately,|immediately.|            |
         |         |               |then enter  |            |            |
         |         |               |command     |            |            |
         |         |               |mode.       |            |            |
         |---------+---------------+------------+------------+------------|
         |\K3      |Send break to  |Send break  |Send break  |Send break  |
         |         |remote modem   |to remote   |to remote   |to DTE      |
         |         |immediately.   |modem       |modem       |immediately.|
         |         |               |immediately.|immediately.|            |
         |---------+---------------+------------+------------+------------|
         |\K4      |Enter command  |Send break  |Send break  |Break sent  |
         |         |mode, do not   |to remote   |to remote   |with        |
         |         |send break to  |modem       |modem with  |received    |
         |         |remote modem.  |immediately,|transmitted |data to the |
         |         |               |then enter  |data.       |DTE.        |
         |         |               |command     |            |            |
         |         |               |mode.       |            |            |
         |---------+---------------+------------+------------+------------|
         |» \K5    |Send break with|Send break  |Send break  |Break sent  |
         |         |transmitted    |to remote   |to remote   |with        |
         |         |data.          |modem       |modem with  |received    |
         |         |               |immediately.|transmitted |data to the |
         |         |               |            |data.       |DTE.        |
         +----------------------------------------------------------------+
       
         +----------------------------------------------------------------+
         |                           BREAK TYPE                           |
         |----------------------------------------------------------------|
         |Type:             |Register                                     |
         |------------------+---------------------------------------------|
         |Format:           |AT [cmds] S59=n [cmds]                       |
         |------------------+---------------------------------------------|
         |Example:          |AT S59=1 <CR>                                |
         |------------------+---------------------------------------------|
         |Description:      |Configures action of break signal.           |
         |----------------------------------------------------------------|
         | Command |Break from DTE | Break from |   Modem    | Break from |
         |         |               |    DTE     |receives \B |remote modem|
         |         |Reliable/Normal|            |            |            |
         |         |     mode      |Direct mode |            |            |
         |---------+---------------+------------+------------+------------|
         |S59=0    |Enter command  |Send break  |Buffers     |Buffers     |
         |         |mode, do not   |to remote   |cleared and |cleared and |
         |         |send break to  |modem       |break sent  |break sent  |
         |         |remote modem.  |immediately,|to remote   |to DTE.     |
         |         |               |then enter  |modem.      |            |
         |         |               |command     |            |            |
         |         |               |mode.       |            |            |
         |---------+---------------+------------+------------+------------|
         |S59=1    |Buffers cleared|Send break  |Buffers     |Buffers     |
         |         |and break sent |to remote   |cleared and |cleared and |
         |         |to remote      |modem       |break sent  |break sent  |
         |         |modem.         |immediately.|to remote   |to DTE.     |
         |         |               |            |modem.      |            |
         |---------+---------------+------------+------------+------------|
         |S59=2    |Enter command  |Send break  |Send break  |Send break  |
         |         |mode, do not   |to remote   |to remote   |to DTE      |
         |         |send break to  |modem       |modem       |immediately.|
         |         |remote modem.  |immediately,|immediately.|            |
         |         |               |then enter  |            |            |
         |         |               |command     |            |            |
         |         |               |mode.       |            |            |
         |---------+---------------+------------+------------+------------|
         |S59=3    |Send break to  |Send break  |Send break  |Send break  |
         |         |remote modem   |to remote   |to remote   |to DTE      |
         |         |immediately.   |modem       |modem       |immediately.|
         |         |               |immediately.|immediately.|            |
         |---------+---------------+------------+------------+------------|
         |S59=4    |Enter command  |Send break  |Send break  |Break sent  |
         |         |mode, do not   |to remote   |to remote   |with        |
         |         |send break to  |modem       |modem with  |received    |
         |         |remote modem.  |immediately,|transmitted |data to the |
         |         |               |then enter  |data.       |DTE.        |
         |         |               |command     |            |            |
         |         |               |mode.       |            |            |
         |---------+---------------+------------+------------+------------|
         |» S59=5  |Send break with|Send break  |Send break  |Break sent  |
         |         |transmitted    |to remote   |to remote   |with        |
         |         |data.          |modem       |modem with  |received    |
         |         |               |immediately.|transmitted |data to the |
         |         |               |            |data.       |DTE.        |
         +----------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CD SIGNAL                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT &C3 *RS1 *SR1<CR>                        |
          |--------------+---------------------------------------------|
          | Description: | Configures the behavior of the carrier      |
          |              | detect signal.                              |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » &C0        | CD forced high.                             |
          |--------------+---------------------------------------------|
          | &C1          | CD normal.                                  |
          |--------------+---------------------------------------------|
          | &C2          | CD forced high except during disconnect.    |
          |--------------+---------------------------------------------|
          | &C3          | CD follows remote RTS signal.               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CHARACTER LENGTH AND PARITY                 |
          |------------------------------------------------------------|
          | Format            | AT [cmds] S61? [cmds]                  |
          |-------------------+----------------------------------------|
          | Example:          | ATS61?<CR>                             |
          |-------------------+----------------------------------------|
          | Default:          | Read-only                              |
          |-------------------+----------------------------------------|
          | Range:            | 0 - 56                                 |
          |-------------------+----------------------------------------|
          | Unit:             | Bit-mapped                             |
          |-------------------+----------------------------------------|
          | Description:      | Reports current character length and   |
          |                   | parity.                                |
          |------------------------------------------------------------|
          |    Bit    | Value        |             Meaning             |
          |-----------+--------------+---------------------------------|
          |   2 - 0   | 0            | Not used.                       |
          |-----------+--------------+---------------------------------|
          |     3     | 0 » 1        | 7 bit character length set.     |
          |           |              |                                 |
          |           |              | 8 bit character length set.     |
          |-----------+--------------+---------------------------------|
          |   5, 4    | » 00 01 10   | MARK parity.                    |
          |           | 11           |                                 |
          |           |              | No parity.                      |
          |           |              |                                 |
          |           |              | Odd parity.                     |
          |           |              |                                 |
          |           |              | Even parity.                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        COMMAND SET                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *NTn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *NT0<CR>                                 |
          |--------------+---------------------------------------------|
          | Description: | Disables the AT command set.                |
          |--------------+---------------------------------------------|
          | Note:        | To re-enable the command set, power down    |
          |              | the modem and then cycle power seven times. |
          |              | The modem must remain powered on each time  |
          |              | at least one second but not more than five. |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » *NT0       | Command set disabled.                       |
          |--------------+---------------------------------------------|
          | *NT1         | Command set enabled.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    COMMUNICATIONS MODE                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Mn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT &M2 H1 DT555-1212<CR>                    |
          |--------------+---------------------------------------------|
          | Description: | Selects the active communications mode.     |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » &M0        | Asynchronous command and data modes.        |
          |--------------+---------------------------------------------|
          | &M1          | Asynchronous command, synchronous connect   |
          |              | mode.                                       |
          |--------------+---------------------------------------------|
          | &M2          | DTR dialing enabled, synchronous connect    |
          |              | mode.                                       |
          |--------------+---------------------------------------------|
          | &M3          | Manual dialing only, synchronous connect    |
          |              | mode.                                       |
          |--------------+---------------------------------------------|
          | &M4          | V.25bis bisynchronous command, synchronous  |
          |              | connect mode.                               |
          |--------------+---------------------------------------------|
          | &M5          | V.25bis SDLC command, synchronous connect   |
          |              | mode.                                       |
          |--------------+---------------------------------------------|
          | &M6          | V.25bis asynchronous command, synchronous   |
          |              | connect mode.                               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        COMPRESSION                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT %Cn                                      |
          |--------------+---------------------------------------------|
          | Example:     | AT *EC0 %C1 *AP0<CR>                        |
          |--------------+---------------------------------------------|
          | Description: | Selects data compression.                   |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | %C0          | Data compression disabled.                  |
          |--------------+---------------------------------------------|
          | » %C1        | Data compression enabled.                   |
          |--------------+---------------------------------------------|
          | %C2          | Data compression enabled on transmit only.  |
          |--------------+---------------------------------------------|
          | %C3          | Data compression enabled on receive only.   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        COMPRESSION                         |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT S56=n                                    |
          |--------------+---------------------------------------------|
          | Example:     | AT *EC0 S56=1 *AP0<CR>                      |
          |--------------+---------------------------------------------|
          | Description: | Selects data compression.                   |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | S56=0        | Data compression disabled.                  |
          |--------------+---------------------------------------------|
          | S56=1        | Data compression enabled on transmit only.  |
          |--------------+---------------------------------------------|
          | S56=2        | Data compression enabled on receive only.   |
          |--------------+---------------------------------------------|
          | » S56=3      | Data compression enabled.                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |         COMPRESSION AND ERROR CORRECTION - CURRENT         |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S71? [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT S71?<CR>                                 |
          |--------------+---------------------------------------------|
          | Default:     | Read-only                                   |
          |--------------+---------------------------------------------|
          | Description: | Reports current compression and error       |
          |              | correction protocols.                       |
          |--------------+---------------------------------------------|
          |    Value     |                   Meaning                   |
          |--------------+---------------------------------------------|
          |      0       | No compression or error correction          |
          |              | protocols active.                           |
          |--------------+---------------------------------------------|
          |      1       | Negotiation in progress.                    |
          |--------------+---------------------------------------------|
          |      2       | MNP2 active.                                |
          |--------------+---------------------------------------------|
          |      3       | MNP3 active.                                |
          |--------------+---------------------------------------------|
          |      4       | MNP4 active.                                |
          |--------------+---------------------------------------------|
          |      5       | MNP5 active.                                |
          |--------------+---------------------------------------------|
          |      6       | V.42 active.                                |
          |--------------+---------------------------------------------|
          |      7       | V.42bis active.                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CONNECT MODE                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Nn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT \N1 DT555-1212<CR>                       |
          |--------------+---------------------------------------------|
          | Description: | Sets connect mode.                          |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | \N0          | Normal mode enabled.                        |
          |--------------+---------------------------------------------|
          | \N1          | Direct mode enabled.                        |
          |--------------+---------------------------------------------|
          | \N2          | MNP mode only enabled.                      |
          |--------------+---------------------------------------------|
          | \N3          | MNP mode with fallback to normal mode       |
          |              | enabled.                                    |
          |--------------+---------------------------------------------|
          | \N4          | LAP-M mode only enabled.                    |
          |--------------+---------------------------------------------|
          | \N5          | LAP-M mode with fallback to normal mode     |
          |              | enabled.                                    |
          |--------------+---------------------------------------------|
          | \N6          | LAP-M mode with fallback to MNP enabled.    |
          |--------------+---------------------------------------------|
          | » \N7        | LAP-M mode with fallback to MNP and normal  |
          |              | modes enabled.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CONNECTION SPEED - CURRENT                 |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S67? [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT S67?<CR>                                 |
          |--------------+---------------------------------------------|
          | Default:     | Read-only                                   |
          |--------------+---------------------------------------------|
          | Description: | Reports current connection speed.           |
          |--------------+---------------------------------------------|
          |    Value     |                   Meaning                   |
          |--------------+---------------------------------------------|
          |      1       | 300bps current speed.                       |
          |--------------+---------------------------------------------|
          |      3       | 1200bps current speed.                      |
          |--------------+---------------------------------------------|
          |      4       | 2400bps current speed.                      |
          |--------------+---------------------------------------------|
          |      5       | 4800bps current speed.                      |
          |--------------+---------------------------------------------|
          |      6       | 7200bps current speed.                      |
          |--------------+---------------------------------------------|
          |      7       | 9600bps uncoded current speed.              |
          |--------------+---------------------------------------------|
          |      8       | 9600bps current speed.                      |
          |--------------+---------------------------------------------|
          |      9       | 12Kbps current speed.                       |
          |--------------+---------------------------------------------|
          |      10      | 14.4Kbps current speed.                     |
          |--------------+---------------------------------------------|
          |      11      | 16.8Kbps current speed.                     |
          |--------------+---------------------------------------------|
          |      12      | 19.2Kbps current speed.                     |
          |--------------+---------------------------------------------|
          |      13      | 21.6Kbps current speed.                     |
          |--------------+---------------------------------------------|
          |      14      | 24Kbps current speed.                       |
          |--------------+---------------------------------------------|
          |      15      | 26.4Kbps current speed.                     |
          |--------------+---------------------------------------------|
          |      16      | 28.8Kbps current speed.                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CONNECTION SPEED LOWER LIMIT                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Ln [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT %L3 %B14 \J0<CR>                         |
          |--------------+---------------------------------------------|
          | Description: | Sets slowest allowed connection speed.      |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » %L0        | No minimum speed.                           |
          |--------------+---------------------------------------------|
          | %L2          | Select 1200bps minimum speed.               |
          |--------------+---------------------------------------------|
          | %L3          | Select 2400bps minimum speed.               |
          |--------------+---------------------------------------------|
          | %L4          | Select 4800bps minimum speed.               |
          |--------------+---------------------------------------------|
          | %L5          | Select 9600bps uncoded minimum speed.       |
          |--------------+---------------------------------------------|
          | %L6          | Select 9600bps minimum speed.               |
          |--------------+---------------------------------------------|
          | %L7          | Select 7200bps minimum speed.               |
          |--------------+---------------------------------------------|
          | %L8          | Select 12Kbps minimum speed.                |
          |--------------+---------------------------------------------|
          | %L9          | Select 14.4Kbps minimum speed.              |
          |--------------+---------------------------------------------|
          | %L11         | Select 16.8Kbps minimum speed.              |
          |--------------+---------------------------------------------|
          | %L12         | Select 19.2Kbps minimum speed.              |
          |--------------+---------------------------------------------|
          | %L13         | Select 21.6Kbps minimum speed.              |
          |--------------+---------------------------------------------|
          | %L14         | Select 24Kbps minimum speed.                |
          |--------------+---------------------------------------------|
          | %L15         | Select 26.4Kbps minimum speed.              |
          |--------------+---------------------------------------------|
          | %L16         | Select 28.8Kbps minimum speed.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CONNECTION SPEED LOWER LIMIT                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S81=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT %L3 S81=14 \J0<CR>                       |
          |--------------+---------------------------------------------|
          | Description: | Sets slowest allowed connection speed.      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    S81=0     | No minimum speed.                           |
          |--------------+---------------------------------------------|
          |    S81=3     | Select 1200bps minimum speed.               |
          |--------------+---------------------------------------------|
          |    S81=4     | Select 2400bps minimum speed.               |
          |--------------+---------------------------------------------|
          |    S81=5     | Select 4800bps minimum speed.               |
          |--------------+---------------------------------------------|
          |    S81=6     | Select 7200bps minimum speed.               |
          |--------------+---------------------------------------------|
          |    S81=7     | Select 9600bps uncoded minimum speed.       |
          |--------------+---------------------------------------------|
          |    S81=8     | Select 9600bps minimum speed.               |
          |--------------+---------------------------------------------|
          |    S81=9     | Select 12Kbps minimum speed.                |
          |--------------+---------------------------------------------|
          |    S81=10    | Select 14.4Kbps minimum speed.              |
          |--------------+---------------------------------------------|
          |    S81=11    | Select 16.8Kbps minimum speed.              |
          |--------------+---------------------------------------------|
          |    S81=12    | Select 19.2Kbps minimum speed.              |
          |--------------+---------------------------------------------|
          |    S81=13    | Select 21.6Kbps minimum speed.              |
          |--------------+---------------------------------------------|
          |    S81=14    | Select 24Kbps minimum speed.                |
          |--------------+---------------------------------------------|
          |    S81=15    | Select 26.4Kbps minimum speed.              |
          |--------------+---------------------------------------------|
          |    S81=16    | Select 28.8Kbps minimum speed.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CONNECTION SPEED UPPER LIMIT                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT %L3 %B14 \J0<CR>                         |
          |--------------+---------------------------------------------|
          | Description: | Sets fastest allowed connection speed.      |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | %B0          | Follow serial port speed.                   |
          |--------------+---------------------------------------------|
          | %B1          | Select 300bps maximum speed.                |
          |--------------+---------------------------------------------|
          | %B2          | Select 1200bps maximum speed.               |
          |--------------+---------------------------------------------|
          | %B3          | Select 2400bps maximum speed.               |
          |--------------+---------------------------------------------|
          | %B4          | Select 4800bps maximum speed.               |
          |--------------+---------------------------------------------|
          | %B5          | Select 9600bps uncoded maximum speed.       |
          |--------------+---------------------------------------------|
          | %B6          | Select 9600bps maximum speed.               |
          |--------------+---------------------------------------------|
          | %B7          | Select 7200bps maximum speed.               |
          |--------------+---------------------------------------------|
          | %B8          | Select 12Kbps maximum speed.                |
          |--------------+---------------------------------------------|
          | » %B9        | Select 14.4Kbps maximum speed.              |
          |--------------+---------------------------------------------|
          | %B11         | Select 16.8Kbps maximum speed.              |
          |--------------+---------------------------------------------|
          | %B12         | Select 19.2Kbps maximum speed.              |
          |--------------+---------------------------------------------|
          | %B13         | Select 21.6Kbps maximum speed.              |
          |--------------+---------------------------------------------|
          | %B14         | Select 24Kbps maximum speed.                |
          |--------------+---------------------------------------------|
          | %B15         | Select 26.4Kbps maximum speed.              |
          |--------------+---------------------------------------------|
          | %B16         | Select 28.8Kbps maximum speed.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CONNECTION SPEED UPPER LIMIT                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S69=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT %L3 S69=14 \J0<CR>                       |
          |--------------+---------------------------------------------|
          | Description: | Sets fastest allowed connection speed.      |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | S69=0        | Follow serial port speed.                   |
          |--------------+---------------------------------------------|
          | S69=1        | Select 300bps maximum speed.                |
          |--------------+---------------------------------------------|
          | S69=3        | Select 1200bps maximum speed.               |
          |--------------+---------------------------------------------|
          | S69=4        | Select 2400bps maximum speed.               |
          |--------------+---------------------------------------------|
          | S69=5        | Select 4800bps maximum speed.               |
          |--------------+---------------------------------------------|
          | S69=6        | Select 7200bps maximum speed.               |
          |--------------+---------------------------------------------|
          | S69=7        | Select 9600bps uncoded maximum speed.       |
          |--------------+---------------------------------------------|
          | S69=8        | Select 9600bps maximum speed.               |
          |--------------+---------------------------------------------|
          | S69=9        | Select 12Kbps maximum speed.                |
          |--------------+---------------------------------------------|
          | » S69=10     | Select 14.4Kbps maximum speed.              |
          |--------------+---------------------------------------------|
          | S69=11       | Select 16.8Kbps maximum speed.              |
          |--------------+---------------------------------------------|
          | S69=12       | Select 19.2Kbps maximum speed.              |
          |--------------+---------------------------------------------|
          | S69=13       | Select 21.6Kbps maximum speed.              |
          |--------------+---------------------------------------------|
          | S69=14       | Select 24Kbps maximum speed.                |
          |--------------+---------------------------------------------|
          | S69=15       | Select 26.4Kbps maximum speed.              |
          |--------------+---------------------------------------------|
          | S69=16       | Select 28.8Kbps maximum speed.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CTS SIGNAL                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Rn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT &R0<CR>                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects the function of the CTS signal.     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          | &R0          | CTS normal.                                 |
          |--------------+---------------------------------------------|
          | » &R1        | CTS forced high.                            |
          |--------------+---------------------------------------------|
          | &R2          | CTS follows CD.                             |
          |--------------+---------------------------------------------|
          | &R9          | CTS follows RTS.                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  DISCONNECT BUFFER DELAY                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Dn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT %D0<CR>                                  |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Configures how long the modem will wait to  |
          |              | disconnect if there is data in the transmit |
          |              | or receive buffers.                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  DISCONNECT BUFFER DELAY                   |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S62=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT S62=0<CR>                                |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Configures how long the modem will wait to  |
          |              | disconnect if there is data in the transmit |
          |              | or receive buffers.                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               DISCONNECT ON LOSS OF CURRENT                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *LCn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT*LC0<CR>                                  |
          |--------------+---------------------------------------------|
          | Description: | Causes the modem to disconnect if the       |
          |              | telephone line’s current drops.             |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | *LC0         | Do not disconnect on loss of current.       |
          |--------------+---------------------------------------------|
          | *LC1         | Disconnect after 8ms if current is lost.    |
          |--------------+---------------------------------------------|
          | » *LC2       | Disconnect after 90ms if current is lost.   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      DISCONNECT RESET                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *ROn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT*RO0<CR>                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects whether the modem will reset on     |
          |              | disconnect.                                 |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » *RO0       | Modem will not reset on disconnect.         |
          |--------------+---------------------------------------------|
          | *RO1         | Modem will reset on disconnect.             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   DISPLAY STORED NUMBERS                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *ND [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT*CN3,555-1212 *ND<CR>                     |
          |--------------+---------------------------------------------|
          | Description: | Displays all stored phone numbers.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         DSR SIGNAL                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Sn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT &S0<CR>                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects the function of the DSR signal.     |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » &S0        | DSR forced high.                            |
          |--------------+---------------------------------------------|
          | &S1          | DSR normal.                                 |
          |--------------+---------------------------------------------|
          | &S2          | DSR normal, except forced low on            |
          |              | disconnect.                                 |
          |--------------+---------------------------------------------|
          | &S3          | DSR follows OH.                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   EXTENDED RESULT CODES                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Vn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT \V1 %C1<CR>                              |
          |--------------+---------------------------------------------|
          | Description: | Selects extended result codes.              |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » \V0        | Extended result codes disabled.             |
          |--------------+---------------------------------------------|
          | \V1          | Extended result codes enabled.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   EXTENDED RESULT CODES                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S82=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT %L3 S82=4 \J0<CR>                        |
          |--------------+---------------------------------------------|
          | Description: | Selects extended result codes.              |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » S82=0      | Display DTE rate; extended result codes     |
          |              | disabled.                                   |
          |--------------+---------------------------------------------|
          | S82=4        | Display DCE rate; extended result codes     |
          |              | enabled.                                    |
          |--------------+---------------------------------------------|
          | S82=8        | Display DCE rate; extended result codes     |
          |              | disabled.                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      FACTORY DEFAULTS                      |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT &Fn                                      |
          |--------------+---------------------------------------------|
          | Example:     | AT &F8<CR>                                  |
          |--------------+---------------------------------------------|
          | Default:     | 1                                           |
          |--------------+---------------------------------------------|
          | Range:       | 1-9                                         |
          |--------------+---------------------------------------------|
          | Description: | Loads factory defaults set n.               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        FLOW CONTROL                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Gn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT G1 &M0<CR>                               |
          |--------------+---------------------------------------------|
          | Description: | Selects modem port flow control.            |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » \G0        | Flow control disabled.                      |
          |--------------+---------------------------------------------|
          | \G1          | Flow control enabled.                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |        FLOW CONTROL CHARACTER - XOFF FROM TERMINAL         |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S45=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | ATS45=22<CR>                                |
          |--------------+---------------------------------------------|
          | Default:     | 19                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character the terminal sends to    |
          |              | represent XOFF.                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |         FLOW CONTROL CHARACTER - XON FROM TERMINAL         |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S44=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | ATS44=20<CR>                                |
          |--------------+---------------------------------------------|
          | Default:     | 17                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character the terminal sends to    |
          |              | represent XON.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |         FLOW CONTROL CHARACTER - XOFF TO TERMINAL          |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S50=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | ATS50=23<CR>                                |
          |--------------+---------------------------------------------|
          | Default:     | 19                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character the modem sends to       |
          |              | represent XOFF.                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          FLOW CONTROL CHARACTER - XON TO TERMINAL          |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S49=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | ATS49=21<CR>                                |
          |--------------+---------------------------------------------|
          | Default:     | 17                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character the modem sends to       |
          |              | represent XON.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     FLOW CONTROL MODE                      |
          |------------------------------------------------------------|
          | Format          | AT [cmds] S54=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Example:        | ATS54=35<CR>                             |
          |-----------------+------------------------------------------|
          | Default:        | 33                                       |
          |-----------------+------------------------------------------|
          | Range:          | 0 - 123                                  |
          |-----------------+------------------------------------------|
          | Unit:           | Bit-mapped                               |
          |-----------------+------------------------------------------|
          | Description:    | Controls flow control type and           |
          |                 | pass-through.                            |
          |------------------------------------------------------------|
          |    Bit    | Value |                Function                |
          |-----------+-------+----------------------------------------|
          |   1, 0    | 00 »  | Flow control disabled.                 |
          |           | 01 10 |                                        |
          |           | 11    | Bidirectional XON/XOFF flow control    |
          |           |       | enabled.                               |
          |           |       |                                        |
          |           |       | CTS flow control by DCE enabled.       |
          |           |       |                                        |
          |           |       | Bidirectional CTS/RTS flow control     |
          |           |       | enabled.                               |
          |-----------+-------+----------------------------------------|
          |     2     | 0     | Not used.                              |
          |-----------+-------+----------------------------------------|
          |     3     | » 0 1 | Flow control disabled.                 |
          |           |       |                                        |
          |           |       | Flow control enabled.                  |
          |-----------+-------+----------------------------------------|
          |     4     | » 0 1 | XON/XOFF signals trapped by local      |
          |           |       | modem.                                 |
          |           |       |                                        |
          |           |       | XON/XOFF passed through local modem.   |
          |-----------+-------+----------------------------------------|
          |   6, 5    | 00 »  | Flow control by DCE disabled.          |
          |           | 01 10 |                                        |
          |           | 11    | XON/XOFF flow control by DCE enabled.  |
          |           |       |                                        |
          |           |       | RTS flow control by DCE enabled.       |
          |           |       |                                        |
          |           |       | RTS flow control by DCE enabled.       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     FLOW CONTROL TYPE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Qn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT \Q5<CR>                                  |
          |--------------+---------------------------------------------|
          | Description: | Sets type of flow control used by modem.    |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | \Q0          | Flow control disabled.                      |
          |--------------+---------------------------------------------|
          | » \Q1        | Bidirectional XON/XOFF flow control         |
          |              | enabled.                                    |
          |--------------+---------------------------------------------|
          | \Q2          | CTS flow control by DCE enabled.            |
          |--------------+---------------------------------------------|
          | \Q3          | Bidirectional CTS/RTS flow control enabled. |
          |--------------+---------------------------------------------|
          | \Q4          | Flow control by DCE disabled.               |
          |--------------+---------------------------------------------|
          | » \Q5        | XON/XOFF flow control by DCE enabled.       |
          |--------------+---------------------------------------------|
          | \Q6          | RTS flow control by DCE enabled.            |
          |--------------+---------------------------------------------|
          | \Q7          | RTS flow control by DCE enabled.            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       FORCE RETRAIN                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *RRn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *RR14 O<CR>                              |
          |--------------+---------------------------------------------|
          | Description: | Forces the modem to attempt to retrain to   |
          |              | the selected speed.                         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *RR0     | Attempt 2400bps speed.                      |
          |--------------+---------------------------------------------|
          |     *RR1     | Attempt 4800bps speed.                      |
          |--------------+---------------------------------------------|
          |     *RR2     | Attempt 7200bps speed.                      |
          |--------------+---------------------------------------------|
          |     *RR3     | Attempt 9600bps speed.                      |
          |--------------+---------------------------------------------|
          |     *RR4     | Attempt 12Kbps speed.                       |
          |--------------+---------------------------------------------|
          |     *RR5     | Attempt 14.4Kbps speed.                     |
          |--------------+---------------------------------------------|
          |     *RR6     | Attempt 16.8Kbps speed.                     |
          |--------------+---------------------------------------------|
          |     *RR7     | Attempt 19.2Kbps speed.                     |
          |--------------+---------------------------------------------|
          |     *RR8     | Attempt 21.6Kbps speed.                     |
          |--------------+---------------------------------------------|
          |     *RR9     | Attempt 24Kbps speed.                       |
          |--------------+---------------------------------------------|
          |    *RR10     | Attempt 26.4Kbps speed.                     |
          |--------------+---------------------------------------------|
          |    *RR11     | Attempt 28.8Kbps speed.                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        HANG UP MODE                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Hn [cmds]                         |
          |--------------+---------------------------------------------|
          | Example:     | AT H3 O<CR>                                 |
          |--------------+---------------------------------------------|
          | Description: | Selects how the modem will hang up.         |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » H2         | Set hang up mode to normal on next ATH      |
          |              | command.                                    |
          |--------------+---------------------------------------------|
          | H3           | Set hang up mode to fast on next ATH        |
          |              | command.                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        HELP SCREENS                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT $H=xxxx                                  |
          |--------------+---------------------------------------------|
          | Example:     | AT $H=MNP<CR>                               |
          |--------------+---------------------------------------------|
          | Description: | Shows modem help screens. If a string is    |
          |              | included as shown in the example, the modem |
          |              | will perform a search for the string;       |
          |              | otherwise, the whole help section will be   |
          |              | displayed.                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      INACTIVITY TIMER                      |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Tn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT\T20<CR>                                  |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 minute                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of time that the modem does |
          |              | not receive information before it           |
          |              | disconnects.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      INACTIVITY TIMER                      |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S58=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT S58=20<CR>                               |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 minute                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of time that the modem does |
          |              | not receive information before it           |
          |              | disconnects.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 LEASED LINE BACKUP NUMBER                  |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S35=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT S35=3<CR>                                |
          |--------------+---------------------------------------------|
          | Description: | Sets the memory location the modem will     |
          |              | dial for DTR dialing and leased-line        |
          |              | backup.                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             LEASED LINE BACKUP RECOVERY DELAY              |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S28=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | ATS28=5<CR>                                 |
          |--------------+---------------------------------------------|
          | Default:     | 15                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 minute                                    |
          |--------------+---------------------------------------------|
          | Description: | After leased line failure, modem attempts   |
          |              | to reconnect after specified delay.         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           LEASED LINE BACKUP - RESTORAL OPTIONS            |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *DBn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *DB0 D555-1212<CR>                       |
          |--------------+---------------------------------------------|
          | Description: | Selects what will initiate the restoral of  |
          |              | a leased line connection.                   |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » *DB0       | Modem will restore connection only when     |
          |              | modem receives *LB or *LD.                  |
          |--------------+---------------------------------------------|
          | *DB1         | Modem will restore connection               |
          |              | automatically.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                LEASED LINE BACKUP - RESTORE                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *LB  [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *OR1 *LB <CR>                            |
          |--------------+---------------------------------------------|
          | Description: | Commands the modem to attempt to restore    |
          |              | the leased line connection, or to wait for  |
          |              | a leased line call if in answer-only mode.  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           LEASED LINE BACKUP - RESTORE MANUALLY            |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *LD  [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *OR0 *LD <CR>                            |
          |--------------+---------------------------------------------|
          | Description: | Commands the modem to dial the default      |
          |              | number to restore the leased line           |
          |              | connection.                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               LEASED LINE TRANSMISSION LEVEL               |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *TLn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *TL15<CR>                                |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 30                                      |
          |--------------+---------------------------------------------|
          | Unit:        | -1 dBm                                      |
          |--------------+---------------------------------------------|
          | Description: | Sets the signal level for transmission when |
          |              | in leased line mode.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               LEASED LINE TRANSMISSION LEVEL               |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S52=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT S52=15<CR>                               |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 30                                      |
          |--------------+---------------------------------------------|
          | Unit:        | -1 dBm                                      |
          |--------------+---------------------------------------------|
          | Description: | Sets the signal level for transmission when |
          |              | in leased line mode.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         LINE TYPE                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Ln [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT &L2 H1 DT555-1212<CR>                    |
          |--------------+---------------------------------------------|
          | Description: | Selects line type.                          |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » &L0        | Switched line.                              |
          |--------------+---------------------------------------------|
          | &L1          | 2-wire leased line.                         |
          |--------------+---------------------------------------------|
          | &L2          | 4-wire leased line.                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          LOCAL SERIAL PORT SPEED CHANGE ON PIN 23          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *FBn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *FB1<CR>                                 |
          |--------------+---------------------------------------------|
          | Description: | Selects whether a voltage transition on pin |
          |              | 23 will cause the modem to change the       |
          |              | serial port speed.                          |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » *FB0       | Pin 23 transition ignored.                  |
          |--------------+---------------------------------------------|
          | *FB1         | Pin 23 negative causes modem to increase    |
          |              | serial port speed; pin 23 positive causes   |
          |              | modem to decrease serial port speed.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             LOCAL SERIAL PORT SPEED - CURRENT              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S80=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT %L3 S80=14 \J0<CR>                       |
          |--------------+---------------------------------------------|
          | Description: | Reports the current serial port speed.      |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          |      1       | 300bps current speed.                       |
          |--------------+---------------------------------------------|
          |      2       | 600bps current speed.                       |
          |--------------+---------------------------------------------|
          |      3       | 1200bps current speed.                      |
          |--------------+---------------------------------------------|
          |      4       | 2400bps current speed.                      |
          |--------------+---------------------------------------------|
          |      5       | 4800bps current speed.                      |
          |--------------+---------------------------------------------|
          |      6       | 7200bps current speed.                      |
          |--------------+---------------------------------------------|
          |      7       | 9600bps current speed.                      |
          |--------------+---------------------------------------------|
          |      8       | 12Kbps current speed.                       |
          |--------------+---------------------------------------------|
          |      9       | 14.4Kbps current speed.                     |
          |--------------+---------------------------------------------|
          |      10      | 16.8Kbps current speed.                     |
          |--------------+---------------------------------------------|
          |      11      | 19.2Kbps current speed.                     |
          |--------------+---------------------------------------------|
          |      12      | 21.6Kbps current speed.                     |
          |--------------+---------------------------------------------|
          |      13      | 24Kbps current speed.                       |
          |--------------+---------------------------------------------|
          |      14      | 26.4Kbps current speed.                     |
          |--------------+---------------------------------------------|
          |      15      | 28.8Kbps current speed.                     |
          |--------------+---------------------------------------------|
          |      16      | 38.4Kbps current speed.                     |
          |--------------+---------------------------------------------|
          |      17      | 57.6Kbps current speed.                     |
          |--------------+---------------------------------------------|
          |      18      | 115.2Kbps current speed.                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      LOCK SERIAL PORT                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Jn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT %L3 %B14 \J0<CR>                         |
          |--------------+---------------------------------------------|
          | Description: | Sets operation of serial port speed.        |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » \J0        | Serial speed locked.                        |
          |--------------+---------------------------------------------|
          | \J1          | Serial speed follows connect speed.         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  LOOPBACK TEST ON PIN 18                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *LAn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT*LA0<CR>                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls whether the modem will perform a   |
          |              | local analog loopback test when pin 18 goes |
          |              | high.                                       |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » *LA0       | Pin 18 has no function.                     |
          |--------------+---------------------------------------------|
          | *LA1         | Pin 18 going high causes the modem to       |
          |              | perform local analog loopback test.         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  LOOPBACK TEST ON PIN 21                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *RDn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT*RD0<CR>                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls whether the modem will perform a   |
          |              | remote digital loopback test when pin 21    |
          |              | goes high.                                  |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » *RD0       | Pin 21 has no function.                     |
          |--------------+---------------------------------------------|
          | *RD1         | Pin 21 going high causes the modem to       |
          |              | perform remote digital loopback test.       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |            MAXIMUM BLOCK SIZE FOR TRANSMISSION             |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \An [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT \A3 %C1<CR>                              |
          |--------------+---------------------------------------------|
          | Description: | Sets the maximum transmittable block size.  |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | \A0          | MNP block size is 64 characters.            |
          |--------------+---------------------------------------------|
          | \A1          | MNP block size is 128 characters.           |
          |--------------+---------------------------------------------|
          | \A2          | MNP block size is 192 characters.           |
          |--------------+---------------------------------------------|
          | » \A3        | MNP block size is 256 characters.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |            MAXIMUM BLOCK SIZE FOR TRANSMISSION             |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S63=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT S63=3 %C1<CR>                            |
          |--------------+---------------------------------------------|
          | Description: | Sets the maximum transmittable block size.  |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | S63=0        | MNP block size is 64 characters.            |
          |--------------+---------------------------------------------|
          | S63=1        | MNP block size is 128 characters.           |
          |--------------+---------------------------------------------|
          | S63=2        | MNP block size is 192 characters.           |
          |--------------+---------------------------------------------|
          | » S63=3      | MNP block size is 256 characters.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       PROTOCOL/SPEED                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *MMn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT %E1 *MM12<CR>                            |
          |--------------+---------------------------------------------|
          | Description: | Selects the current protocol.               |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *MM0     | Selects all protocols.                      |
          |--------------+---------------------------------------------|
          |     *MM1     | Selects V.21 only.                          |
          |--------------+---------------------------------------------|
          |     *MM2     | Selects Bell 103 only.                      |
          |--------------+---------------------------------------------|
          |     *MM3     | Selects Bell 212 only.                      |
          |--------------+---------------------------------------------|
          |     *MM5     | Selects V.22bis only.                       |
          |--------------+---------------------------------------------|
          |     *MM6     | Selects V.27bis only.                       |
          |--------------+---------------------------------------------|
          |     *MM8     | Selects V.29 only.                          |
          |--------------+---------------------------------------------|
          |    *MM10     | Selects V.33 only.                          |
          |--------------+---------------------------------------------|
          |    *MM11     | Selects V.32bis only.                       |
          |--------------+---------------------------------------------|
          |    *MM12     | Selects V.34 only.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       PROTOCOL/SPEED                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S88=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT %E1 S88=12<CR>                           |
          |--------------+---------------------------------------------|
          | Description: | Selects the current protocol.               |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    S88=0     | Selects all protocols.                      |
          |--------------+---------------------------------------------|
          |    S88=1     | Selects V.21 only.                          |
          |--------------+---------------------------------------------|
          |    S88=2     | Selects Bell 103 only.                      |
          |--------------+---------------------------------------------|
          |    S88=3     | Selects Bell 212 only.                      |
          |--------------+---------------------------------------------|
          |    S88=5     | Selects V.22bis only.                       |
          |--------------+---------------------------------------------|
          |    S88=6     | Selects V.27bis only.                       |
          |--------------+---------------------------------------------|
          |    S88=8     | Selects V.29 only.                          |
          |--------------+---------------------------------------------|
          |    S88=10    | Selects V.33 only.                          |
          |--------------+---------------------------------------------|
          |    S88=11    | Selects V.32bis only.                       |
          |--------------+---------------------------------------------|
          |    S88=12    | Selects V.34 only.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  PROTOCOL/SPEED - CURRENT                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S91? [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT %E1 S91?<CR>                             |
          |--------------+---------------------------------------------|
          | Description: | Reports the current protocol.               |
          |--------------+---------------------------------------------|
          |    Value     |                   Meaning                   |
          |--------------+---------------------------------------------|
          |      0       | Modem will select protocol automatically.   |
          |--------------+---------------------------------------------|
          |      1       | V.21 only selected.                         |
          |--------------+---------------------------------------------|
          |      2       | Bell 103 only selected.                     |
          |--------------+---------------------------------------------|
          |      3       | Bell 212 only selected.                     |
          |--------------+---------------------------------------------|
          |      5       | V.22bis only selected.                      |
          |--------------+---------------------------------------------|
          |      6       | V.27bis only selected.                      |
          |--------------+---------------------------------------------|
          |      8       | V.29 only selected.                         |
          |--------------+---------------------------------------------|
          |      10      | V.33 only selected.                         |
          |--------------+---------------------------------------------|
          |      11      | V.32bis only selected.                      |
          |--------------+---------------------------------------------|
          |      12      | V.34 only selected.                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    REMOTE CONFIGURATION                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %T=n [cmds]                       |
          |              |                                             |
          |              | AT [cmds] D<#>%Tn [cmds]                    |
          |--------------+---------------------------------------------|
          | Example:     | AT &V2 %T=102475                            |
          |              |                                             |
          |              | AT D555-1212%T102475<CR>                    |
          |--------------+---------------------------------------------|
          | Description: | Initiates a remote configuration session.   |
          |              | This command may follow a dial command,     |
          |              | omitting the equal sign, to initiate remote |
          |              | configuration immediately on connection. %T |
          |              | with no parameter will quit the current     |
          |              | session.                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               REMOTE CONFIGURATION PASSWORD                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %P=nnnn [cmds]                    |
          |--------------+---------------------------------------------|
          | Example:     | AT %P=102475 D555-1212<CR>                  |
          |--------------+---------------------------------------------|
          | Default:     | N/A                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0-99999999, D, <none>                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the security code for remote           |
          |              | configuration sessions. If nnnn is omitted, |
          |              | the code will be cleared; if a D is given,  |
          |              | remote configuration is disabled.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     REPORT INFORMATION                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] In [cmds]                         |
          |--------------+---------------------------------------------|
          | Example:     | AT I3 &V1 %V<CR>                            |
          |--------------+---------------------------------------------|
          | Description: | Displays modem properties.                  |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      I0      | Reports modem model and speed.              |
          |--------------+---------------------------------------------|
          |      I1      | Reports checksum number.                    |
          |--------------+---------------------------------------------|
          |      I3      | Reports firmware version.                   |
          |--------------+---------------------------------------------|
          |      I4      | Reports feature code.                       |
          |--------------+---------------------------------------------|
          |      I5      | Reports reason for last disconnect.         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |        REPORT INFORMATION AND CONFIGURATION PROFILE        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Vn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT I3 &V1 %V<CR>                            |
          |--------------+---------------------------------------------|
          | Description: | Reports configuration profiles and other    |
          |              | information.                                |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &V0      | Report configuration profiles.              |
          |--------------+---------------------------------------------|
          |     &V1      | Report connection status and internal modem |
          |              | information.                                |
          |--------------+---------------------------------------------|
          |     &V2      | Report active configuration profile.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   REPORT PRODUCT VERSION                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %V [cmds]                         |
          |--------------+---------------------------------------------|
          | Example:     | AT I3 &V1 %V<CR>                            |
          |--------------+---------------------------------------------|
          | Description: | Reports product version.                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    REPORT SERIAL NUMBER                    |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $V [cmds]                         |
          |--------------+---------------------------------------------|
          | Example:     | AT I3 &V1 $V<CR>                            |
          |--------------+---------------------------------------------|
          | Description: | Reports product serial number.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      RESULT CODE MODE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *RCn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *RC0<CR>                                 |
          |--------------+---------------------------------------------|
          | Description: | Selects normal or Motorola result code      |
          |              | numbering.                                  |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » *RC0       | Result code 15 is CONNECT 4800 and code 18  |
          |              | is CONNECT 9600 (standard).                 |
          |--------------+---------------------------------------------|
          | *RC1         | Result code 11 is CONNECT 4800 and code 12  |
          |              | is CONNECT 9600 (Motorola).                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      RESULT CODE MODE                      |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S57=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT S57=0<CR>                                |
          |--------------+---------------------------------------------|
          | Description: | Selects normal or Motorola result code      |
          |              | numbering.                                  |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » S57=0      | Result code 15 is CONNECT 4800 and code 18  |
          |              | is CONNECT 9600 (standard).                 |
          |--------------+---------------------------------------------|
          | S57=1        | Result code 11 is CONNECT 4800 and code 12  |
          |              | is CONNECT 9600 (Motorola).                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    RETRAIN SENSITIVITY                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Rn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT &C3 %R1<CR>                              |
          |--------------+---------------------------------------------|
          | Description: | Sets how poor line conditions must be       |
          |              | before the modem will initiate a retrain.   |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » %R0        | Modem will not initiate retrain.            |
          |--------------+---------------------------------------------|
          | %R1          | Modem will initiate retrain when the Bit    |
          |              | Error Rate exceeds 10-5 for eight seconds,  |
          |              | or for one second in V.22bis mode.          |
          |--------------+---------------------------------------------|
          | %R2          | Modem will initiate retrain when the Bit    |
          |              | Error Rate exceeds 10-4 for eight seconds,  |
          |              | or for one second in V.22bis mode.          |
          |--------------+---------------------------------------------|
          | %R3          | Modem will initiate retrain when the Bit    |
          |              | Error Rate exceeds 10-3 for eight seconds,  |
          |              | or for one second in V.22bis mode.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    RETRAIN SENSITIVITY                     |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S53=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT &C3 S53=1<CR>                            |
          |--------------+---------------------------------------------|
          | Description: | Sets how poor line conditions must be       |
          |              | before the modem will initiate a retrain.   |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » S53=0      | Modem will not initiate retrain.            |
          |--------------+---------------------------------------------|
          | S53=4        | Modem will initiate retrain when the Bit    |
          |              | Error Rate exceeds 10-5 for eight seconds,  |
          |              | or for one second in V.22bis mode.          |
          |--------------+---------------------------------------------|
          | S53=8        | Modem will initiate retrain when the Bit    |
          |              | Error Rate exceeds 10-4 for eight seconds,  |
          |              | or for one second in V.22bis mode.          |
          |--------------+---------------------------------------------|
          | S53=12       | Modem will initiate retrain when the Bit    |
          |              | Error Rate exceeds 10-3 for eight seconds,  |
          |              | or for one second in V.22bis mode.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         RI SIGNAL                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Rn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT \R0 Q0<CR>                               |
          |--------------+---------------------------------------------|
          | Description: | Controls the behavior of the Ring Indicator |
          |              | signal.                                     |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | \R0          | RI signal high during rings, and forced     |
          |              | high for duration of call.                  |
          |--------------+---------------------------------------------|
          | » \R1        | RI signal high during rings only.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               SECURITY - AUTOCALLBACK DELAY                |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S78=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT S78=10<CR>                               |
          |--------------+---------------------------------------------|
          | Default:     | 30                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Configures how long the modem will wait to  |
          |              | execute the autocallback sequence after an  |
          |              | incoming call is detected.                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 SECURITY - CALLBACK DELAY                  |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S74=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT S74=30<CR>                               |
          |--------------+---------------------------------------------|
          | Default:     | 15                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Configures how long the modem will wait to  |
          |              | execute a callback sequence after the user  |
          |              | has disconnected.                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 SECURITY - CALLBACK NUMBER                 |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $Cn=<#> [cmds]                    |
          |--------------+---------------------------------------------|
          | Example:     | AT $L0=3 $C0=1(303)443-3388<CR>             |
          |--------------+---------------------------------------------|
          | Description: | Sets the callback number for user number n. |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 SECURITY - CALLBACK RETRY                  |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S75=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT S75=5<CR>                                |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 redial                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets how many times the modem will attempt  |
          |              | to execute a callback if the first call     |
          |              | fails.                                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              SECURITY - CALLBACK RETRY DELAY               |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S76=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT S76=60<CR>                               |
          |--------------+---------------------------------------------|
          | Default:     | 15                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Configures how long the modem will wait to  |
          |              | execute another callback sequence after one |
          |              | has failed.                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       SECURITY CHECK                       |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $D? [cmds]                        |
          |              |                                             |
          |              | AT [cmds] $E? [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT $DR $D?<CR>                              |
          |--------------+---------------------------------------------|
          | Description: | Reports whether security is enabled.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   SECURITY - DELETE USER                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $Rn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT $R3<CR>                                  |
          |--------------+---------------------------------------------|
          | Description: | Deletes the user number n. User IDs 0 and 1 |
          |              | cannot be deleted.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      SECURITY DISABLE                      |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $D=xxxx                           |
          |--------------+---------------------------------------------|
          | Example:     | AT $D=MicroHouse<CR>                        |
          |--------------+---------------------------------------------|
          | Description: | Disables security. A password must be       |
          |              | specified.                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              SECURITY ENABLE - HIGH SECURITY               |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $EH=xxxx                          |
          |--------------+---------------------------------------------|
          | Example:     | AT $EH=SuperSecret<CR>                      |
          |--------------+---------------------------------------------|
          | Description: | Enables security. The superuser password    |
          |              | must be specified.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               SECURITY ENABLE - LOW SECURITY               |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $E=xxxx                           |
          |--------------+---------------------------------------------|
          | Example:     | AT $E=MicroHouse<CR>                        |
          |--------------+---------------------------------------------|
          | Description: | Enables security. A password must be        |
          |              | specified.                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          SECURITY - FAILED LOGIN ATTEMPT COUNTERS          |
          |------------------------------------------------------------|
          | Type:        | Configuration/Immediate                     |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $Mn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT $M $M*<CR>                               |
          |--------------+---------------------------------------------|
          | Description: | Displays or clears the counters for failed  |
          |              | login attempts. If a number is specified,   |
          |              | the counter will be reset for that user. If |
          |              | an * follows, all counters will be cleared. |
          |              | If no character follows, the counters will  |
          |              | be displayed.                               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          SECURITY - FAILED LOGIN ATTEMPT MAXIMUM           |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S77=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT S77=3<CR>                                |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 attempt                                   |
          |--------------+---------------------------------------------|
          | Description: | Sets the maximum number of failed logins    |
          |              | the modem will accept until it disconnects. |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             SECURITY - HIGH SECURITY PASSWORD              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $Pn=xxxx$xxxx                     |
          |--------------+---------------------------------------------|
          | Example:     | AT $P0=SuperSecret$SuperSecret<CR>          |
          |--------------+---------------------------------------------|
          | Description: | Sets the password for user number n to      |
          |              | xxxx. User number 0 is the superuser. The   |
          |              | password must be between 4 and 34           |
          |              | characters inclusive. The $ character may   |
          |              | not be used.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               SECURITY - HIGH SECURITY RESET               |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $F=xxxx$xxxx                      |
          |--------------+---------------------------------------------|
          | Example:     | AT $F=SuperSecret$SuperSecret<CR>           |
          |--------------+---------------------------------------------|
          | Description: | Resets the high security options to their   |
          |              | factory defaults.                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       SECURITY LEVEL                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $Lm=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT $L0=3 $C0=1(303)443-3388<CR>             |
          |--------------+---------------------------------------------|
          | Description: | Sets the security level for user number m.  |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    $Lm=1     | Modem prompts for a user ID and password on |
          |              | connection.                                 |
          |--------------+---------------------------------------------|
          |    $Lm=2     | Modem prompts for a user ID and password on |
          |              | connection, then modem begins callback      |
          |              | sequence.                                   |
          |--------------+---------------------------------------------|
          |    $Lm=3     | Modem prompts for a user ID and password on |
          |              | connection, then modem begins callback      |
          |              | sequence. When modem reconnects, it prompts |
          |              | for a user ID and password again.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       SECURITY LOGIN                       |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $n=xxxx [cmds]                    |
          |--------------+---------------------------------------------|
          | Example:     | AT $1=MicroHouse<CR>                        |
          |--------------+---------------------------------------------|
          | Description: | Logs into modem, from the local machine or  |
          |              | remotely.                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      SECURITY LOGOUT                       |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $$ [cmds]                         |
          |--------------+---------------------------------------------|
          | Example:     | AT $$<CR>                                   |
          |--------------+---------------------------------------------|
          | Description: | Logs out from the modem.                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              SECURITY - LOW SECURITY PASSWORD              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $S=xxxx                           |
          |--------------+---------------------------------------------|
          | Example:     | AT $S=MicroHouse<CR>                        |
          |--------------+---------------------------------------------|
          | Description: | Sets an empty login password to xxxx.       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          SECURITY - LOW SECURITY PASSWORD CHANGE           |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $C=xxxx,yyyy                      |
          |--------------+---------------------------------------------|
          | Example:     | AT $CMicroHouse=Fubar<CR>                   |
          |--------------+---------------------------------------------|
          | Description: | Changes the password xxxx to yyyy. If a -   |
          |              | is given for yyyy, the password will be     |
          |              | deleted.                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               SECURITY - LOW SECURITY RESET                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $DR [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT $DR $D?<CR>                              |
          |--------------+---------------------------------------------|
          | Description: | Resets the low security options to their    |
          |              | factory defaults.                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      SECURITY OPTIONS                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $Wm=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT $W0=3 $C0=1(303)443-3388<CR>             |
          |--------------+---------------------------------------------|
          | Description: | Controls what features a remote user has    |
          |              | access to.                                  |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     $W0      | Remote users can access no extra features.  |
          |--------------+---------------------------------------------|
          |     $W1      | Remote users can change their passwords and |
          |              | callback numbers.                           |
          |--------------+---------------------------------------------|
          |     $W2      | Remote users can change their passwords and |
          |              | callback numbers and login as the           |
          |              | superuser.                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  SECURITY - PASSWORD TIME                  |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S73=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | AT S73=10<CR>                               |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Configures how long the modem will wait for |
          |              | a password when in secure mode.             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             SECURITY - REPORT SUPERUSER STATUS             |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $Sn? [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT $S3?<CR>                                 |
          |--------------+---------------------------------------------|
          | Description: | Reports whether user n has superuser        |
          |              | status.                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              SECURITY - REPORT USER SETTINGS               |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $In [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT $I3<CR>                                  |
          |--------------+---------------------------------------------|
          | Description: | Reports security level and callback number  |
          |              | for user n.                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              SECURITY - REPORT USERS SETTINGS              |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $IBn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT $IB11<CR>                                |
          |--------------+---------------------------------------------|
          | Description: | Reports security level and callback number  |
          |              | for the ten users beginning at user number  |
          |              | n.                                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 SECURITY - SUPERUSER MODE                  |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $S=xxxx [cmds]                    |
          |--------------+---------------------------------------------|
          | Example:     | AT $S=SuperSecret<CR>                       |
          |--------------+---------------------------------------------|
          | Description: | Attempts to enter superuser mode.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    STATUS REGISTER BIT                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | Write: AT [cmds] Sn.m=0 or 1 [cmds]         |
          |              |                                             |
          |              | Read: AT [cmds] Sn.m=? [cmds]               |
          |--------------+---------------------------------------------|
          | Example:     | AT S40.4=1 S51.3?<CR>                       |
          |--------------+---------------------------------------------|
          | Description: | Sets/clears or reads bit m of register n.   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                STATUS REGISTER HEXADECIMAL                 |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | Write: AT [cmds] Sn^=hh [cmds]              |
          |              |                                             |
          |              | Read: AT [cmds] Sn?^ [cmds]                 |
          |--------------+---------------------------------------------|
          | Example:     | AT S99^=3F S99?^<CR>                        |
          |--------------+---------------------------------------------|
          | Description: | Sets register n to hexadecimal number hh or |
          |              | displays register n in hexadecimal.         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                STORE PHONE NUMBER IN NVRAM                 |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *CNn,<#>                          |
          |--------------+---------------------------------------------|
          | Example:     | AT *AU4 *CN4,1(303)443-3388<CR>             |
          |--------------+---------------------------------------------|
          | Description: | Stores a phone number in the modem’s        |
          |              | memory.                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              SWITCHED LINE TRANSMISSION LEVEL              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Zn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT %R1 %Z1<CR>                              |
          |--------------+---------------------------------------------|
          | Description: | Sets the signal level for transmission.     |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » %Z0        | Permissive transmission level (level fixed  |
          |              | at -9dBm.)                                  |
          |--------------+---------------------------------------------|
          | %Z1          | Programmable transmission level (level      |
          |              | controlled by exterior resistor, or -12dBm  |
          |              | if absent.)                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              SWITCHED LINE TRANSMISSION LEVEL              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *TDn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *TD15<CR>                                |
          |--------------+---------------------------------------------|
          | Default:     | 9                                           |
          |--------------+---------------------------------------------|
          | Range:       | 9 - 30                                      |
          |--------------+---------------------------------------------|
          | Unit:        | -1 dBm                                      |
          |--------------+---------------------------------------------|
          | Description: | Sets the signal level for transmission when |
          |              | in switched line mode.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       TALK/DATA MODE                       |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *DAn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *DA1 <CR>                                |
          |--------------+---------------------------------------------|
          | Description: | Selects talk or data mode.                  |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » *DA0       | Talk mode enabled.                          |
          |--------------+---------------------------------------------|
          | *DA1         | Data mode enabled.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |       TEST MODE - BIDIRECTIONAL ANALOG LOOPBACK TEST       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *ANn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *AN1<CR>                                 |
          |--------------+---------------------------------------------|
          | Description: | Controls the bidirectional local analog     |
          |              | loopback test mode.                         |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » *AN0       | End loopback test.                          |
          |--------------+---------------------------------------------|
          | *AN1         | Begin loopback test.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |      TEST MODE - BIDIRECTIONAL DIGITAL LOOPBACK TEST       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *DGn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *DG1<CR>                                 |
          |--------------+---------------------------------------------|
          | Description: | Controls the bidirectional local digital    |
          |              | loopback test mode.                         |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » *DG0       | End loopback test.                          |
          |--------------+---------------------------------------------|
          | *DG1         | Begin loopback test.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         TEST MODES                         |
          |------------------------------------------------------------|
          | Format        | AT [cmds] S34=n [cmds]                     |
          |---------------+--------------------------------------------|
          | Example:      | ATS34=4<CR>                                |
          |---------------+--------------------------------------------|
          | Default:      | 0                                          |
          |---------------+--------------------------------------------|
          | Range:        | 0 - 15                                     |
          |---------------+--------------------------------------------|
          | Unit:         | Bit-mapped                                 |
          |---------------+--------------------------------------------|
          | Description:  | Initiates and controls loopback tests.     |
          |------------------------------------------------------------|
          |   Bit   | Value |                 Function                 |
          |---------+-------+------------------------------------------|
          |    0    | » 0 1 | End bidirectional local analog loopback  |
          |         |       | test.                                    |
          |         |       |                                          |
          |         |       | Begin bidirectional local analog         |
          |         |       | loopback test.                           |
          |---------+-------+------------------------------------------|
          |    1    | » 0 1 | End bidirectional local digital loopback |
          |         |       | test.                                    |
          |         |       |                                          |
          |         |       | Begin bidirectional local digital        |
          |         |       | loopback test.                           |
          |---------+-------+------------------------------------------|
          |    2    | » 0 1 | Pin 18 has no function.                  |
          |         |       |                                          |
          |         |       | Pin 18 going high causes the modem to    |
          |         |       | perform local analog loopback test.      |
          |---------+-------+------------------------------------------|
          |    3    | » 0 1 | Pin 21 has no function.                  |
          |         |       |                                          |
          |         |       | Pin 21 going high causes the modem to    |
          |         |       | perform remote digital loopback test.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        TEST STATUS                         |
          |------------------------------------------------------------|
          | Format        | AT [cmds] S16=n [cmds]                     |
          |---------------+--------------------------------------------|
          | Example:      | ATS16=32<CR>                               |
          |---------------+--------------------------------------------|
          | Default:      | Read-only                                  |
          |---------------+--------------------------------------------|
          | Range:        | 0 - 255                                    |
          |---------------+--------------------------------------------|
          | Unit:         | Bit-mapped                                 |
          |---------------+--------------------------------------------|
          | Description:  | Contains status of loopback tests.         |
          |------------------------------------------------------------|
          |   Bit   | Value  |                Function                 |
          |---------+--------+-----------------------------------------|
          |    0    |   0    | Local analog loopback test not in       |
          |         |        | progress.                               |
          |         |   1    |                                         |
          |         |        | Local analog loopback test in progress. |
          |---------+--------+-----------------------------------------|
          |    1    |   0    | Remote analog loopback test not in      |
          |         |        | progress.                               |
          |         |   1    |                                         |
          |         |        | Remote analog loopback test in          |
          |         |        | progress.                               |
          |---------+--------+-----------------------------------------|
          |    2    |   0    | Local digital loopback test not in      |
          |         |        | progress.                               |
          |         |   1    |                                         |
          |         |        | Local digital loopback test in          |
          |         |        | progress.                               |
          |---------+--------+-----------------------------------------|
          |    3    |   0    | Remotely requested remote digital       |
          |         |        | loopback test not in progress.          |
          |         |   1    |                                         |
          |         |        | Remotely requested remote digital       |
          |         |        | loopback test in progress.              |
          |---------+--------+-----------------------------------------|
          |    4    |   0    | Locally requested remote digital        |
          |         |        | loopback test not in progress.          |
          |         |   1    |                                         |
          |         |        | Locally requested remote digital        |
          |         |        | loopback test in progress.              |
          |---------+--------+-----------------------------------------|
          |    5    |   0    | Remote digital loopback with local      |
          |         |        | self-test not in progress.              |
          |         |   1    |                                         |
          |         |        | Remote digital loopback with local      |
          |         |        | self-test in progress.                  |
          |---------+--------+-----------------------------------------|
          |    6    |   0    | Local analog loopback with local        |
          |         |        | self-test not in progress.              |
          |         |   1    |                                         |
          |         |        | Local analog loopback with local        |
          |         |        | self-test in progress.                  |
          |---------+--------+-----------------------------------------|
          |    7    |   0    | Remote analog loopback with local       |
          |         |        | self-test not in progress.              |
          |         |   1    |                                         |
          |         |        | Remote analog loopback with local       |
          |         |        | self-test in progress.                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      V.25bis OPTIONS                       |
          |------------------------------------------------------------|
          | Format          | AT [cmds] S30=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Example:        | ATS30=4<CR>                              |
          |-----------------+------------------------------------------|
          | Default:        | 0                                        |
          |-----------------+------------------------------------------|
          | Range:          | 0 - 230                                  |
          |-----------------+------------------------------------------|
          | Unit:           | Bit-mapped                               |
          |-----------------+------------------------------------------|
          | Description:    | Controls V.25bis character set, VAL      |
          |                 | response, NRZ/NRZI, and communications   |
          |                 | mode.                                    |
          |------------------------------------------------------------|
          |    Bit    | Value   |               Function               |
          |-----------+---------+--------------------------------------|
          |     0     | 0       | Not used.                            |
          |-----------+---------+--------------------------------------|
          |     1     | » 0 1   | Use ASCII character set.             |
          |           |         |                                      |
          |           |         | Use EBCDIC character set.            |
          |-----------+---------+--------------------------------------|
          |     2     | » 0 1   | VAL response enabled.                |
          |           |         |                                      |
          |           |         | VAL response disabled.               |
          |-----------+---------+--------------------------------------|
          |     3     | 0       | Not used.                            |
          |-----------+---------+--------------------------------------|
          |     4     | 0       | Not used.                            |
          |-----------+---------+--------------------------------------|
          |     5     | » 0 1   | Use NRZ mode.                        |
          |           |         |                                      |
          |           |         | Use NRZI mode.                       |
          |-----------+---------+--------------------------------------|
          |   7, 6    | » 00 01 | V.25bis command set disabled.        |
          |           | 10 11   |                                      |
          |           |         | V.25bis bisynchronous command,       |
          |           |         | synchronous connect mode.            |
          |           |         |                                      |
          |           |         | V.25bis SDLC command, synchronous    |
          |           |         | connect mode.                        |
          |           |         |                                      |
          |           |         | V.25bis asynchronous command,        |
          |           |         | synchronous connect mode.            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   V.32 HANDSHAKE OPTIONS                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *FTn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *FT0<CR>                                 |
          |--------------+---------------------------------------------|
          | Description: | Shortens V.32 and V.32bis handshake time.   |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » *FT0       | Normal handshake sequence.                  |
          |--------------+---------------------------------------------|
          | *FT1         | Training time is shortened by 2 seconds in  |
          |              | V.32 and V.32bis modes.                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        V.34 OPTIONS                        |
          |------------------------------------------------------------|
          | Format:        | AT [cmds] S95=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Example:       | ATS95=240<CR>                             |
          |----------------+-------------------------------------------|
          | Default:       | 240                                       |
          |----------------+-------------------------------------------|
          | Range:         | 0 - 240                                   |
          |----------------+-------------------------------------------|
          | Unit:          | Bit-mapped                                |
          |----------------+-------------------------------------------|
          | Description:   | Controls non-linear coding, pre-emphasis, |
          |                | shaping, and pre-coding.                  |
          |------------------------------------------------------------|
          |    Bit    | Value |                Function                |
          |-----------+-------+----------------------------------------|
          |   3 - 1   | 0     | Not used.                              |
          |-----------+-------+----------------------------------------|
          |     4     | 0 » 1 | Non-linear coding disabled.            |
          |           |       |                                        |
          |           |       | Non-linear coding enabled.             |
          |-----------+-------+----------------------------------------|
          |     5     | 0 » 1 | Pre-emphasis disabled.                 |
          |           |       |                                        |
          |           |       | Pre-emphasis enabled.                  |
          |-----------+-------+----------------------------------------|
          |     6     | 0 » 1 | Constellation shaping disabled.        |
          |           |       |                                        |
          |           |       | Constellation shaping enabled.         |
          |-----------+-------+----------------------------------------|
          |     7     | 0 » 1 | Pre-coding disabled.                   |
          |           |       |                                        |
          |           |       | Pre-coding enabled.                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        V.34 OPTIONS                        |
          |------------------------------------------------------------|
          | Format:         | AT [cmds] S96=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Example:        | ATS96=160<CR>                            |
          |-----------------+------------------------------------------|
          | Default:        | 160                                      |
          |-----------------+------------------------------------------|
          | Range:          | 0 - 160                                  |
          |-----------------+------------------------------------------|
          | Unit:           | Bit-mapped                               |
          |-----------------+------------------------------------------|
          | Description:    | Controls TX level deviation and          |
          |                 | asymmetric bit rates.                    |
          |------------------------------------------------------------|
          |    Bit     | Value |               Function                |
          |------------+-------+---------------------------------------|
          |   4 - 0    | 0     | Not used.                             |
          |------------+-------+---------------------------------------|
          |     5      | 0 » 1 | Asymmetric bit rates disabled.        |
          |            |       |                                       |
          |            |       | Asymmetric bit rates enabled.         |
          |------------+-------+---------------------------------------|
          |     6      | 0     | Not used.                             |
          |------------+-------+---------------------------------------|
          |     7      | 0 » 1 | TX level deviation disabled.          |
          |            |       |                                       |
          |            |       | TX level deviation enabled.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  V.34 RETRAIN SENSITIVITY                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *THn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *MM12 *TH1<CR>                           |
          |--------------+---------------------------------------------|
          | Description: | Sets how poor line conditions must be       |
          |              | before the modem will initiate a retrain    |
          |              | when in V.34 mode.                          |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » *TH0       | Modem will initiate retrain when the Bit    |
          |              | Error Rate exceeds 10-6.                    |
          |--------------+---------------------------------------------|
          | *TH1         | Modem will initiate retrain when the Bit    |
          |              | Error Rate exceeds 10-4.                    |
          |--------------+---------------------------------------------|
          | *TH2         | Modem will initiate retrain when the Bit    |
          |              | Error Rate exceeds 10-2.                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    V.34 SPLIT BAUD MODE                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *ASn [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | AT *AS1 <CR>                                |
          |--------------+---------------------------------------------|
          | Description: | Controls V.34 split baud mode.              |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *AS0     | V.34 split baud mode disabled.              |
          |--------------+---------------------------------------------|
          |     *AS1     | V.34 split baud mode enabled.               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   V.42 NEGOTIATION MODE                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Mn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT \M0 H1 DT555-1212<CR>                    |
          |--------------+---------------------------------------------|
          | Description: | Selects how the modem negotiates V.42       |
          |              | modulation during handshaking.              |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | \M0          | Normal handshaking enabled.                 |
          |--------------+---------------------------------------------|
          | » \M1        | Fast handshaking enabled.                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   XON/XOFF PASS-THROUGH                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Xn [cmds]                        |
          |--------------+---------------------------------------------|
          | Example:     | AT \X7 O<CR>                                |
          |--------------+---------------------------------------------|
          | Description: | Selects whether XON/XOFF signals are sent   |
          |              | to remote modem.                            |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » \X0        | XON/XOFF signals trapped by local modem.    |
          |--------------+---------------------------------------------|
          | \X1          | XON/XOFF passed through local modem.        |
          +------------------------------------------------------------+
       
                         Proprietary V.25bis Command Set
       
          +------------------------------------------------------------+
          |                         CONNECTION                         |
          |------------------------------------------------------------|
          | Type:        | Response                                    |
          |--------------+---------------------------------------------|
          | Format:      | CNX@nnnnnBPS                                |
          |--------------+---------------------------------------------|
          | Description: | A connection has been successfully          |
          |              | established at the rate specified.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               DISPLAY CURRENT COMMAND STATUS               |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | RLOnnn;xx                                   |
          |--------------+---------------------------------------------|
          | Example:     | RLO112;2<CR>                                |
          |--------------+---------------------------------------------|
          | Description: | Displays current setting of modem commands. |
          |              | If no parameters are given, all commands    |
          |              | will be displayed. Otherwise, xx addresses  |
          |              | will be displayed beginning at nnn.         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   DISPLAY LINKED NUMBERS                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | RLL                                         |
          |--------------+---------------------------------------------|
          | Example:     | RLL<CR>                                     |
          |--------------+---------------------------------------------|
          | Description: | Requests the modem to return the list of    |
          |              | linked stored numbers.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   DISPLAY STORED NUMBERS                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | RLN                                         |
          |--------------+---------------------------------------------|
          | Example:     | RLN<CR>                                     |
          |--------------+---------------------------------------------|
          | Description: | Requests the modem to return the list of    |
          |              | stored numbers.                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                          INVALID                           |
          |------------------------------------------------------------|
          | Type:        | Response                                    |
          |--------------+---------------------------------------------|
          | Format:      | INVxx                                       |
          |--------------+---------------------------------------------|
          | Example:     | INVCU                                       |
          |--------------+---------------------------------------------|
          | Description: | The modem was issued an improper command.   |
          |              | The two letters following indicate the      |
          |              | error.                                      |
          |--------------+---------------------------------------------|
          |     Code     |                   Meaning                   |
          |--------------+---------------------------------------------|
          |    INVCU     | An error occurred in transmission.          |
          |--------------+---------------------------------------------|
          |    INVMS     | The command was too long or was followed by |
          |              | a semicolon.                                |
          |--------------+---------------------------------------------|
          |    INVPS     | An improper number parameters were issued.  |
          |--------------+---------------------------------------------|
          |    INVPV     | The parameters were ignored or invalid.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    LINK STORED NUMBERS                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | PRLm;n                                      |
          |--------------+---------------------------------------------|
          | Example:     | PRL1;2<CR>                                  |
          |--------------+---------------------------------------------|
          | Description: | Links memory location m to memory location  |
          |              | n. If a call to location m fails, the       |
          |              | number at n will be dialed.                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                           REDIAL                           |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | CRRn                                        |
          |--------------+---------------------------------------------|
          | Example:     | CRR4<CR>                                    |
          |--------------+---------------------------------------------|
          | Description: | Redials the last number dialed up to n      |
          |              | times.                                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   REPORT PRODUCT VERSION                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | RLV                                         |
          |--------------+---------------------------------------------|
          | Example:     | RLV<CR>                                     |
          |--------------+---------------------------------------------|
          | Description: | Reports product version.                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               RESET MODEM TO STORED PROFILE                |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | PRPn                                        |
          |--------------+---------------------------------------------|
          | Example:     | PRP3<CR>                                    |
          |--------------+---------------------------------------------|
          | Description: | Resets modem to stored profile n.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        SET OPTIONS                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | PROnnn;aa;bb;cc...                          |
          |--------------+---------------------------------------------|
          | Example:     | PRO112;02;01<CR>                            |
          |--------------+---------------------------------------------|
          | Description: | Sets various options. The first number is   |
          |              | the first address to set. Following         |
          |              | parameters set the addresses, starting with |
          |              | nnn and progressing. In this example,       |
          |              | address 112 would be set to 02 and address  |
          |              | 113 would be set to 01.                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    STORE ACTIVE PROFILE                    |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | PRK                                         |
          |--------------+---------------------------------------------|
          | Example:     | PRK<CR>                                     |
          |--------------+---------------------------------------------|
          | Description: | Writes the values for the current profile   |
          |              | into the non-volatile RAM.                  |
          +------------------------------------------------------------+