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       # MOTOROLA, INC.
       
          V.3600
       
          Card Type              Modem                                   
          Chip Set               Motorola                                
          I/O Options            25-pin DTE port, line in, line out      
          Maximum Data Rate      33.6Kbps                                
          Maximum Fax Rate       14.4Kbps                                
          Data Modulation        Bell 103, 212A                          
          Protocol                                                       
                                 ITU-T V.21, V.22, V.22bis, V.27, V.29,  
                                 V.32, V.32bis, V.33, V.34               
          Fax Modulation         ITU-T V.17, V.21 CH2, V.27ter, V.29     
          Protocol               
          Error                  MNP5, V.42, V.42bis                     
          Correction/Compression 
          Fax Class              Class I                                 
          Data Bus               External                                
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |       Function       |  Label  |   Function    |   Label   |
          |------------------------------------------------------------|
          | Line out                   |   CN1   | Power cord   | CN4  |
          |----------------------------+---------+--------------+------|
          | Line in                    |   CN2   | Power switch | SW1  |
          |----------------------------+---------+--------------+------|
          | 25-pin DTE port            |   CN3   |              |      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          | LED |    Color     | Status |          Condition           |
          |-----+--------------+--------+------------------------------|
          | TR  | Unidentified |   On   |      DTR signal is high      |
          |-----+--------------+--------+------------------------------|
          | TR  | Unidentified |  Off   |      DTR signal is low       |
          |-----+--------------+--------+------------------------------|
          | CS  | Unidentified |   On   |      CTS signal is high      |
          |-----+--------------+--------+------------------------------|
          | CS  | Unidentified |  Off   |      CTS signal is low       |
          |-----+--------------+--------+------------------------------|
          | RS  | Unidentified |   On   |      RTS signal is high      |
          |-----+--------------+--------+------------------------------|
          | RS  | Unidentified |  Off   |      RTS signal is low       |
          |-----+--------------+--------+------------------------------|
          | CD  | Unidentified |   On   |  Carrier signal detected or  |
          |     |              |        | error correction negotiation |
          |     |              |        |          completed           |
          |-----+--------------+--------+------------------------------|
          | CD  | Unidentified |  Off   | Carrier signal not detected  |
          |-----+--------------+--------+------------------------------|
          | RD  | Unidentified |   On   |   Modem is receiving data    |
          |-----+--------------+--------+------------------------------|
          | RD  | Unidentified |  Off   | Modem is not receiving data  |
          |-----+--------------+--------+------------------------------|
          | TD  | Unidentified |   On   |  Modem is transmitting data  |
          |-----+--------------+--------+------------------------------|
          | TD  | Unidentified |  Off   |  Modem is not transmitting   |
          |     |              |        |             data             |
          +------------------------------------------------------------+
       
                                         
       
                                         
       
          +------------------------------------------------------------+
          |                   SUPPORTED COMMAND SET                    |
          |------------------------------------------------------------|
          |                     Basic AT Commands                      |
          |------------------------------------------------------------|
          | +++, ‘comma’, A/                                           |
          |------------------------------------------------------------|
          |   A, E, F, M, O, V, X                                      |
          |------------------------------------------------------------|
          | &G, &P, &T, &W, &X, &Y                                     |
          |------------------------------------------------------------|
          |                    Extended AT Commands                    |
          |------------------------------------------------------------|
          | \A, \G, \T, \X, \V                                         |
          |------------------------------------------------------------|
          | %A                                                         |
          |------------------------------------------------------------|
          |                        S-Registers                         |
          |------------------------------------------------------------|
          | S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12,     |
          | S16, S18, S22                                              |
          |------------------------------------------------------------|
          |                                                            |
          |------------------------------------------------------------|
          |      Note: See MHI documentation for complete information. |
          +------------------------------------------------------------+
       
                            PROPRIETARY AT COMMAND SET
       
          +------------------------------------------------------------+
          |                    COMMUNICATIONS MODE                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Mn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the active communications mode.     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &M0      | Asynchronous command and data modes.        |
          |--------------+---------------------------------------------|
          |     &M1      | Asynchronous command and synchronous        |
          |              | connect mode.                               |
          |--------------+---------------------------------------------|
          |     &M2      | DTR dialing enabled and synchronous connect |
          |              | mode.                                       |
          |--------------+---------------------------------------------|
          |     &M3      | Manual dialing only and synchronous connect |
          |              | mode.                                       |
          |--------------+---------------------------------------------|
          |     &M4      | V.25bis BISYNC command and synchronous      |
          |              | connect mode (ASCII).                       |
          |--------------+---------------------------------------------|
          |     &M5      | V.25bis SDLC command and synchronous        |
          |              | connect mode (NRZ).                         |
          |--------------+---------------------------------------------|
          |     &M6      | V.25bis asynchronous command and            |
          |              | synchronous connect mode.                   |
          |--------------+---------------------------------------------|
          |     &M7      | V.25bis asynchronous command and            |
          |              | asynchronous connect mode.                  |
          |--------------+---------------------------------------------|
          |     &M8      | V.25bis BISYNC command and synchronous      |
          |              | connect mode (EBCDIC).                      |
          |--------------+---------------------------------------------|
          |     &M9      | V.25bis asynchronous command and            |
          |              | synchronous connect mode (EBCDIC, NRZ).     |
          |--------------+---------------------------------------------|
          |     &M10     | V.25bis SDLC command and synchronous        |
          |              | connect mode (ASCII, NRZ).                  |
          |--------------+---------------------------------------------|
          |     &M11     | V.25bis SDLC command and synchronous        |
          |              | connect mode (EBCDIC, NRZ).                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CONFIGURATION PROFILES                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &V [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays active and stored configuration    |
          |              | profiles                                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &V0      | Displays configuration profiles             |
          |--------------+---------------------------------------------|
          |     &V1      | Displays received signal options            |
          |--------------+---------------------------------------------|
          |     &V2      | Displays active profile                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CTS SIGNAL                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Rn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the function of the CTS signal.     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &R0      | RTS to CTS delay enabled.                   |
          |--------------+---------------------------------------------|
          |    í &R1     | CTS forced high.                            |
          |--------------+---------------------------------------------|
          |     &R2      | CTS follows CD.                             |
          |--------------+---------------------------------------------|
          |     &R9      | CTS follows RTS.                            |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                 DATA TERMINAL READY (DTR)                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Dn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects modem response to DTR               |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     í&D0     | DTR override                                |
          |--------------+---------------------------------------------|
          |     &D1      | DTR toggle causes online command mode       |
          |--------------+---------------------------------------------|
          |     &D2      | Normal DTR operations                       |
          |--------------+---------------------------------------------|
          |     &D3      | Resets on receipt of DTR                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         DCD SIGNAL                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Configures the behavior of the DCD signal.  |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í &C0     | DCD forced high.                            |
          |--------------+---------------------------------------------|
          |     &C1      | DCD normal.                                 |
          |--------------+---------------------------------------------|
          |     &C2      | DCD forced high except during handshaking   |
          |              | and disconnecting.                          |
          |--------------+---------------------------------------------|
          |     &C3      | DCD follows remote RTS signal.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                            DIAL                            |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] D<#> [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Dials telephone number according to any     |
          |              | modifiers included in the string            |
          |--------------+---------------------------------------------|
          | Note:        | Any combination of modifiers can be used to |
          |              | produce the desired dial functions in       |
          |              | sequence.                                   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      DP      | Pulse dialing enabled                       |
          |--------------+---------------------------------------------|
          |      DR      | Answer mode enabled; originate mode         |
          |              | disabled following handshake initiation.    |
          |--------------+---------------------------------------------|
          |     DS=n     | Dial stored telephone number n              |
          |--------------+---------------------------------------------|
          |      DT      | Tone dialing enabled/Pulse dialing disabled |
          |--------------+---------------------------------------------|
          |      DW      | Dialing resumed following dial tone         |
          |              | detection                                   |
          |--------------+---------------------------------------------|
          |      D,      | Dialing paused for amount of time specified |
          |              | in S8 register                              |
          |--------------+---------------------------------------------|
          |      D!      | Flash function initiated. Modem commanded   |
          |              | to go off-hook for .5sec before returning   |
          |              | on-hook.                                    |
          |--------------+---------------------------------------------|
          |      D@      | Wait for Quite Answer function enabled.     |
          |              | Modem waits until a "quiet answer," a       |
          |              | ring-back signal followed by silence up to  |
          |              | the time specified in S7, is received prior |
          |              | to executing the rest of the dial string.   |
          |--------------+---------------------------------------------|
          |      D;      | Modem returned to idle state after dialing. |
          |              | The semicolon can only be placed at the end |
          |              | of the dial command.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         DSR SIGNAL                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Sn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls the behaviour of the DSR signal.   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í &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] Wn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Enables selection of additional result      |
          |              | codes.                                      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      W0      | Negotiation displays disabled               |
          |--------------+---------------------------------------------|
          |      W1      | Negotiation displays enabled                |
          |--------------+---------------------------------------------|
          |      W2      | Enables CONNECT result codes to report DCE  |
          |              | speed                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  FACTORY DEFAULT PROFILE                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Fn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets values in active profile to values     |
          |              | found in the default profile                |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &F0      | Load factory profile 1                      |
          |--------------+---------------------------------------------|
          |     &F1      | Load factory profile 1                      |
          |--------------+---------------------------------------------|
          |     &F1      | Load factory profile 2                      |
          |--------------+---------------------------------------------|
          |     &F3      | Load factory profile 3                      |
          |--------------+---------------------------------------------|
          |     &F4      | Load factory profile 4                      |
          |--------------+---------------------------------------------|
          |     &F5      | Load factory profile 5                      |
          |--------------+---------------------------------------------|
          |     &F6      | Load factory profile 6                      |
          |--------------+---------------------------------------------|
          |     &F7      | Load factory profile 7                      |
          |--------------+---------------------------------------------|
          |     &F8      | Load factory profile 8                      |
          |--------------+---------------------------------------------|
          |     &F9      | Load factory profile 9                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        HANG UP MODE                        |
          |------------------------------------------------------------|
          | Type:        | Immdeiate/Configuration                     |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Hn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Commands the modem to go on- or off-hook,   |
          |              | and selects how the modem will hang up.     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      H0      | Modem commanded to go on-hook (hang up).    |
          |--------------+---------------------------------------------|
          |      H1      | Modem commanded to go off-hook (pick up).   |
          |--------------+---------------------------------------------|
          |      H2      | Set hang up mode to normal on next ATH0     |
          |              | command                                     |
          |--------------+---------------------------------------------|
          |      H3      | Set hang up mode to fast on next ATH0       |
          |              | command                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         LINE TYPE                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Ln [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects line type                           |
          |--------------+---------------------------------------------|
          |   Command    |                  Line Type                  |
          |--------------+---------------------------------------------|
          |     &L0      | Switched line (PSTN/Dial-up)                |
          |--------------+---------------------------------------------|
          |     &L1      | 2-wire leased-line                          |
          |--------------+---------------------------------------------|
          |     &L2      | 4-wire leased-line                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   LONG SPACE DISCONNECT                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Yn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Commands the modem to disconnect after a 4  |
          |              | second break is detected                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      Y0      | Long space disconnect function disabled     |
          |--------------+---------------------------------------------|
          |      Y1      | Long space disconnect function enabled      |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                    PULSE DIALING RATIO                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Pn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects pulse dial make/break ratio         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &P0      | 39/61ms at 10pps (North America)            |
          |--------------+---------------------------------------------|
          |     &P1      | 33/67ms at 10pps (Europe)                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     REPORT INFORMATION                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] In [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays information requested              |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      I0      |   Reports product code                      |
          |--------------+---------------------------------------------|
          |      I1      | Reports EPROM checksum                      |
          |--------------+---------------------------------------------|
          |      I3      | Reports product version                     |
          |--------------+---------------------------------------------|
          |      I4      | Reports Motorola V.3600                     |
          |--------------+---------------------------------------------|
          |      I5      | Report reason for last disconnect           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                RESTORE PROFILE ON POWER-UP                 |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Yn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Restores a selected profile into the active |
          |              | profile on power-up (hard reset) &Y?        |
          |              | displays power-up profile                   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &Y0      | Restore profile 1 on power-up               |
          |--------------+---------------------------------------------|
          |     &Y1      | Restore profile 2 on power-up               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        RESULT CODES                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Qn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Enables modem to send result codes to the   |
          |              | DTE                                         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      Q0      | Result code sending enabled                 |
          |--------------+---------------------------------------------|
          |      Q1      | Result code sending disabled                |
          |--------------+---------------------------------------------|
          |      Q2      | Result code sending enabled in originate    |
          |              | mode                                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         SOFT RESET                         |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Zn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Restores modem profiles previously saved in |
          |              | non-volatile RAM using the &W command.      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      Z0      | Restore setting 1                           |
          |--------------+---------------------------------------------|
          |      Z1      | Restore setting 2                           |
          +------------------------------------------------------------+
       
           
       
          +------------------------------------------------------------+
          |                       SPEAKER VOLUME                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Ln [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Controls speaker volume                     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      L0      | Low volume setting                          |
          |--------------+---------------------------------------------|
          |      L1      | Low volume setting                          |
          |--------------+---------------------------------------------|
          |      L2      | Low volume setting                          |
          |--------------+---------------------------------------------|
          |      L3      | High volume setting                         |
          +------------------------------------------------------------+
       
                               EXTENDED AT COMMANDS
       
          +------------------------------------------------------------+
          |          AUTO-RELIABLE TIME BUFFER CONFIGURATION           |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls the handling of incoming data      |
          |              | during auto-reliable time period            |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í \C0     | Data is discarded                           |
          |--------------+---------------------------------------------|
          |     \C1      | Data is buffered                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |         AUTO-RETRAIN - AUTO-FALLBACK/FALL-FORWARD          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %En [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls auto-retrain mode and              |
          |              | fallback/fall-forward                       |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %E0      | Auto-retrain disabled                       |
          |--------------+---------------------------------------------|
          |     %E1      | Auto-retrain enabled                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         BREAK SEND                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | Range:       | 1-255                                       |
          |--------------+---------------------------------------------|
          | Default:     | 35                                          |
          |--------------+---------------------------------------------|
          | Unit:        | 20ms                                        |
          |--------------+---------------------------------------------|
          | Description: | Sends break to modem                        |
          +------------------------------------------------------------+
       
           
       
           
       
       +-------------------------------------------------------------------+
       |                            BREAK TYPE                             |
       |-------------------------------------------------------------------|
       |Type:             |Configuration                                   |
       |------------------+------------------------------------------------|
       |Format:           |AT [cmds] \Kn [cmds]                            |
       |------------------+------------------------------------------------|
       |Description:      |Configures action of break signal.              |
       |-------------------------------------------------------------------|
       | Command |Break from DTE | Break from |   Modem    | Break issued: |
       |         |               |    DTE     |receives \B |command state, |
       |         |connect state, |            |            |reliable/normal|
       |         |reliable/normal|Direct mode |            |     mode      |
       |         |     mode      |            |            |               |
       |---------+---------------+------------+------------+---------------|
       |   \K0   |Enter command  |Send break  |Buffers     |Buffers cleared|
       |         |mode, do not   |to remote   |cleared and |and break sent |
       |         |send break to  |modem       |break sent  |to DTE.        |
       |         |remote modem.  |immediately,|to remote   |               |
       |         |               |then enter  |modem.      |               |
       |         |               |command     |            |               |
       |         |               |mode.       |            |               |
       |---------+---------------+------------+------------+---------------|
       |   \K1   |Buffers cleared|Send break  |Buffers     |Buffers cleared|
       |         |and break sent |to remote   |cleared and |and break sent |
       |         |to remote      |modem       |break sent  |to DTE.        |
       |         |modem.         |immediately.|to remote   |               |
       |         |               |            |modem.      |               |
       |---------+---------------+------------+------------+---------------|
       |   \K2   |Enter command  |Send break  |Send break  |Send break to  |
       |         |mode, do not   |to remote   |to remote   |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 to  |
       |         |remote modem   |to remote   |to remote   |DTE            |
       |         |immediately.   |modem       |modem       |immediately.   |
       |         |               |immediately.|immediately.|               |
       |---------+---------------+------------+------------+---------------|
       |   \K4   |Enter command  |Send break  |Send break  |Break sent with|
       |         |mode, do not   |to remote   |to remote   |received data  |
       |         |send break to  |modem       |modem with  |to the DTE.    |
       |         |remote modem.  |immediately,|transmitted |               |
       |         |               |then enter  |data.       |               |
       |         |               |command     |            |               |
       |         |               |mode.       |            |               |
       |---------+---------------+------------+------------+---------------|
       |  í \K5  |Send break with|Send break  |Send break  |Break sent with|
       |         |transmitted    |to remote   |to remote   |received data  |
       |         |data.          |modem       |modem with  |to the DTE.    |
       |         |               |immediately.|transmitted |               |
       |         |               |            |data.       |               |
       +-------------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        COMPRESSION                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects data compression                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %C0      | Data compression disabled                   |
          |--------------+---------------------------------------------|
          |    í %C1     | V.42bis enabled on transmit and receive     |
          |              | data                                        |
          |--------------+---------------------------------------------|
          |     %C2      | V.42bis enabled on transmit data            |
          |--------------+---------------------------------------------|
          |     %C3      | V.42bis enabled on receive data             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CONNECT MODE                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Nn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls the type of connection the modem   |
          |              | will operate in                             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \N0      | Normal mode enabled                         |
          |--------------+---------------------------------------------|
          |     \N1      | Direct mode enabled                         |
          |--------------+---------------------------------------------|
          |     \N2      | Reliable mode enabled                       |
          |--------------+---------------------------------------------|
          |     \N3      | Auto-reliable mode enabled                  |
          |--------------+---------------------------------------------|
          |     \N4      | V.42 reliable mode enabled                  |
          |--------------+---------------------------------------------|
          |     \N5      | MNP reliable mode enabled                   |
          |--------------+---------------------------------------------|
          |     \N6      | V.42 or MNP reliable mode enabled           |
          |--------------+---------------------------------------------|
          |    í \N7     | V.42, MNP or normal mode enabled            |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                CONNECTION SPEED LOWER LIMIT                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Ln [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets slowest allowed connection speed.      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %L0      | No minimum speed.                           |
          |--------------+---------------------------------------------|
          |     %L1      | 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.              |
          |--------------+---------------------------------------------|
          |     %L17     | Select 31.2Kbps minimum speed.              |
          |--------------+---------------------------------------------|
          |     %L18     | Select 33.6Kbps minimum speed.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CONNECTION SPEED UPPER LIMIT                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | 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.              |
          |--------------+---------------------------------------------|
          |     %B17     | Select 31.2Kbps maximum speed.              |
          |--------------+---------------------------------------------|
          |     %B18     | Select 33.6Kbps maximum speed.              |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                  DISCONNECT BUFFER DELAY                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Dn [cmds]                        |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of time that the modem      |
          |              | processes data in its send and receive      |
          |              | buffers before it disconnects.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  DISPLAY PRODUCT VERSION                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %V [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays product version.                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     FLOW CONTROL TYPE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Qn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets type of flow control used by modem     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \Q0      | Flow control disabled                       |
          |--------------+---------------------------------------------|
          |     \Q1      | Bi-directional XON/XOFF flow control        |
          |              | enabled                                     |
          |--------------+---------------------------------------------|
          |     \Q2      | DTE RTS/CTS flow control enabled            |
          |--------------+---------------------------------------------|
          |    í \Q3     | Bi-directional RTS/CTS flow control enabled |
          |--------------+---------------------------------------------|
          |     \Q4      | DCE flow control disabled                   |
          |--------------+---------------------------------------------|
          |     \Q5      | DCE XON/XOFF flow control enabled           |
          |--------------+---------------------------------------------|
          |     \Q6      | DCE RTS/CTS flow control enabled            |
          |--------------+---------------------------------------------|
          |     \Q7      | DCE RTS/CTS flow control enabled            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      LOCK SERIAL PORT                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Jn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets operation of serial port speed         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í \J0     | Serial speed locked                         |
          |--------------+---------------------------------------------|
          |     \J1      | Serial speed follows connect speed          |
          |--------------+---------------------------------------------|
          |     \J2      | 230.4Kbps DTE speed enabled                 |
          |--------------+---------------------------------------------|
          |     \J3      | 230.4Kbps DTE speed disabled                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    REMOTE CONFIGURATION                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %T=n [cmds]                       |
          |              |                                             |
          |              | AT [cmds] D<#>%Tn [cmds]                    |
          |--------------+---------------------------------------------|
          | 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] %P1=nnnn [cmds]                   |
          |--------------+---------------------------------------------|
          | Default:     | N/A                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0-99999999, D, <none>                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the security code that a remote modem  |
          |              | must send to begin a remote configuration   |
          |              | sessions. If nnnn is omitted, the code will |
          |              | be cleared; if a D is given, remote         |
          |              | configuration is disabled.                  |
          +------------------------------------------------------------+
       
                                         
       
                                         
       
          +------------------------------------------------------------+
          |                    RETRAIN SENSITIVITY                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Rn [cmds]                        |
          |--------------+---------------------------------------------|
          | 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.                    |
          |--------------+---------------------------------------------|
          |     %R2      | Modem will initiate retrain when the Bit    |
          |              | Error Rate exceeds 10-4.                    |
          |--------------+---------------------------------------------|
          |     %R3      | Modem will initiate retrain when the Bit    |
          |              | Error Rate exceeds 10-3.                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       RING INDICATOR                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Rn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls the behavior of the ring indicator |
          |              | signal on pin 22 of the serial port.        |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \R0      | Ring indicate signal high during rings and  |
          |              | forced high for duration of call.           |
          |--------------+---------------------------------------------|
          |     \R1      | Ring indicate signal high during rings      |
          |              | only.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       V.42 DETECTION                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Mn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Enables/disables fast data sequence         |
          |              | expedite V.42 link negotiation              |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \M0      | V.42 fast data sequence enabled             |
          |--------------+---------------------------------------------|
          |    í \M1     | V.42 fast data sequence disabled            |
          +------------------------------------------------------------+
       
                                 SPECIAL COMMANDS
       
          +------------------------------------------------------------+
          |                      ANSWER/ORIGINATE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *ORn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Selects either answer or originate mode in  |
          |              | leased line operation                       |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *OR0     | Originate mode enabled                      |
          |--------------+---------------------------------------------|
          |     *OR1     | Answer mode enabled                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    AUTO-ANSWER OVERRIDE                    |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *IC [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Instructs the modem to ignore the incoming  |
          |              | call, if the modem is set to automatically  |
          |              | answer.                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  AUTO-DIAL STORED NUMBER                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Aun [cmds]                       |
          |--------------+---------------------------------------------|
          | Range:       | 0-9                                         |
          |--------------+---------------------------------------------|
          | Description: | Sets the auto-dialing function to dial the  |
          |              | number stored in memory location n.         |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                 BILATERAL DIGITAL LOOPBACK                 |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *DGn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Enables/disables bilateral loopback test    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í *DG0    | Bilateral digital loopback test disabled    |
          |--------------+---------------------------------------------|
          |     *DG1     | Bilateral digital loopback test enabled     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      CALLBACK NUMBER                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $Cn=x [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Programs callback number x and assigns it   |
          |              | to user number n. Required for security     |
          |              | levels 2 & 3.                               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CALLER ID                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *IDn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Controls the Caller ID function             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *ID0     | Caller ID disabled                          |
          |--------------+---------------------------------------------|
          |     *ID1     | Caller ID enabled                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        COMMAND SET                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *NTn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Disables the AT command set.                |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *NT0     | Command set disabled.                       |
          |--------------+---------------------------------------------|
          |     *NT1     | Command set enabled.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        DIAL BACKUP                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *DBn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Controls dial backup operation              |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *DB0     | Manual dial backup enabled                  |
          |--------------+---------------------------------------------|
          |     *DB1     | Automatic dial backup enabled               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      DISCONNECT RESET                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *ROn [cmds]                       |
          |--------------+---------------------------------------------|
          | 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 SERIAL NUMBER                    |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $V [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays product serial number.             |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                   DISPLAY STORED NUMBERS                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *ND [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Displays all stored phone numbers.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      DISTINCTIVE RING                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *DR=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Controls the Distinctive Ring function      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    *DR=0     | Distinctive Ring disabled                   |
          |--------------+---------------------------------------------|
          |    *DR=1     | Distinctive Ring enabled                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 EXTENDED PASSWORD FEATURES                 |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $Wn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets extended password features. Command    |
          |              | set by superuser (system administrator) $W? |
          |              | queries setting                             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     $W0      | Clears extended settings                    |
          |--------------+---------------------------------------------|
          |     $W1      | Enables a regular user to change his        |
          |              | password and callback number                |
          |--------------+---------------------------------------------|
          |     $W2      | Enables a remote user to gain superuser     |
          |              | privileges                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       FORCE RETRAIN                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *RRn [cmds]                       |
          |--------------+---------------------------------------------|
          | 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.                     |
          |--------------+---------------------------------------------|
          |    *RR12     | Attempt 31.2Kbps speed.                     |
          |--------------+---------------------------------------------|
          |    *RR13     | Attempt 33.6Kbps speed.                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        HELP SCREENS                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT $H=xxxx                                  |
          |--------------+---------------------------------------------|
          | Description: | Shows help screens. If a string is included |
          |              | as shown in the example, the modem will     |
          |              | search for the string; otherwise, the whole |
          |              | help section will be displayed.             |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                    HIGH SECURITY ENABLE                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $EH=x [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Enables security for password x. Superuser  |
          |              | password must be specified                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  ILLEGAL ATTEMPT COUNTER                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $Mn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Keeps count of illegal attempts by users to |
          |              | gain superuser status. Superuser may enter  |
          |              | user account n to reset count of specific   |
          |              | user. $M* resets illegal attempt count for  |
          |              | all users.                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  LINE CURRENT DISCONNECT                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *LCn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Causes the modem to disconnect if the       |
          |              | telephone line’s current drops.             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *LC0     | Line current disconnect disabled            |
          |--------------+---------------------------------------------|
          |     *LC1     | Disconnect after 8ms if current is lost.    |
          |--------------+---------------------------------------------|
          |     *LC2     | Disconnect after 90ms if current is lost.   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   LOCAL ANALOG LOOPBACK                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *LAn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Enables/disables DTE controlled local       |
          |              | analog loopback                             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í *LA0    | Local analog loopback disabled. Pin 18      |
          |              | toggle ignored                              |
          |--------------+---------------------------------------------|
          |     *LA1     | Local analog loopback enabled (pin 18)      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        LOCAL LOGOFF                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $$ [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Allows user to logoff after local session   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        LOCAL LOGON                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $n=x [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Allows user n secure logon with password x  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          LOCAL SERIAL PORT SPEED CHANGE ON PIN 23          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *FBn [cmds]                       |
          |--------------+---------------------------------------------|
          | 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.        |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                     MANUAL DIAL BACKUP                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *LDn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Autodials the number if modem is in         |
          |              | originate mode and manual dial backup is    |
          |              | selected. Available for leased line         |
          |              | operation only                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    MODULATION PROTOCOLS                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *MMn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Selects the protocol to use on the next     |
          |              | connection.                                 |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *MM0     | Auto-detect fastest common protocol.        |
          |--------------+---------------------------------------------|
          |     *MM1     | V.21.                                       |
          |--------------+---------------------------------------------|
          |     *MM2     | Bell 103.                                   |
          |--------------+---------------------------------------------|
          |     *MM4     | Bell 212A.                                  |
          |--------------+---------------------------------------------|
          |     *MM5     | V.22bis.                                    |
          |--------------+---------------------------------------------|
          |     *MM6     | V.27bis 4-wire leased line                  |
          |--------------+---------------------------------------------|
          |     *MM8     | V.29 4-wire leased line                     |
          |--------------+---------------------------------------------|
          |    *MM10     | V.33 4-wire leased line                     |
          |--------------+---------------------------------------------|
          |    *MM11     | V.32bis.                                    |
          |--------------+---------------------------------------------|
          |    *MM12     | V.34.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     PASSWORD SELECTION                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $C=x, y [cmds]                    |
          |--------------+---------------------------------------------|
          | Description: | Changes password where x represents the old |
          |              | password and y the new password. Setting y  |
          |              | to (-) deletes password x from memory and   |
          |              | disables security features                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     PASSWORD SELECTION                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $Pn=x [cmds]                      |
          |--------------+---------------------------------------------|
          | Range (n):   | 0 - 50                                      |
          |--------------+---------------------------------------------|
          | Range (x):   | 4 - 34                                      |
          |--------------+---------------------------------------------|
          | Unit (x):    | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Selects password x and assigns it to user   |
          |              | number n. Superuser privileges are given to |
          |              | user number 1.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    REMOTE CONFIGURATION                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *RAn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Enables/disables remote configuration       |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *RA0     | Remote configuration disabled               |
          |--------------+---------------------------------------------|
          |     *RA1     | Remote configuration disabled               |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                  REMOTE CONNECTION SPEED                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *RBn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Forces the DTE speed to selected setting    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *RB0     | 300bps                                      |
          |--------------+---------------------------------------------|
          |     *RB1     | 600bps                                      |
          |--------------+---------------------------------------------|
          |     *RB2     | 1200bps                                     |
          |--------------+---------------------------------------------|
          |     *RB3     | 2400bps                                     |
          |--------------+---------------------------------------------|
          |     *RB4     | 4800bps                                     |
          |--------------+---------------------------------------------|
          |     *RB5     | 7200bps                                     |
          |--------------+---------------------------------------------|
          |     *RB6     | 9600bps                                     |
          |--------------+---------------------------------------------|
          |     *RB7     | 12.0Kbps                                    |
          |--------------+---------------------------------------------|
          |     *RB8     | 14.4Kbps                                    |
          |--------------+---------------------------------------------|
          |     *RB9     | 16.8Kbps                                    |
          |--------------+---------------------------------------------|
          |    *RB10     | 19.2Kbps                                    |
          |--------------+---------------------------------------------|
          |    *RB11     | 21.6Kbps                                    |
          |--------------+---------------------------------------------|
          |    *RB12     | 24.0Kbps                                    |
          |--------------+---------------------------------------------|
          |    *RB13     | 26.4Kbps                                    |
          |--------------+---------------------------------------------|
          |    *RB14     | 28.8Kbps                                    |
          |--------------+---------------------------------------------|
          |    *RB15     | 28.4Kbps                                    |
          |--------------+---------------------------------------------|
          |    *RB16     | 57.6Kbps                                    |
          |--------------+---------------------------------------------|
          |    *RB17     | 115.2Kbps                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  REMOTE DIGITAL LOOPBACK                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *RDn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Enables/disables DTE controlled remote      |
          |              | digital loopback                            |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í *RD0    | Remote digital loopback disabled. Pin 21    |
          |              | toggle ignored                              |
          |--------------+---------------------------------------------|
          |     *RD1     | Remote digital loopback enabled (pin 21)    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       REMOTE FORMAT                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *RFn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Selects number of data bits, number of stop |
          |              | bits and parity in remote configuration     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *RF0     | 7 data bits, mark parity, 1 stop bit        |
          |--------------+---------------------------------------------|
          |     *RF1     | 7 data bits, no parity, 2 stop bits         |
          |--------------+---------------------------------------------|
          |     *RF2     | 7 data bits, odd parity, 1 stop bit         |
          |--------------+---------------------------------------------|
          |     *RF3     | 7 data bits, even parity, 1 stop bit        |
          |--------------+---------------------------------------------|
          |     *RF4     | 8 data bits, mark parity, 1 stop bit        |
          |--------------+---------------------------------------------|
          |     *RF5     | 8 data bits, no parity, 1 stop bit          |
          |--------------+---------------------------------------------|
          |     *RF6     | 8 data bits, odd parity, 1 stop bit         |
          |--------------+---------------------------------------------|
          |     *RF7     | 8 data bits, even parity, 1 stop bit        |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                        REMOTE SAVE                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *RQn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Selects whether to save or discard remote   |
          |              | configuration                               |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *RQ0     | Save remote configuration and exit          |
          |--------------+---------------------------------------------|
          |     *RQ1     | Discard remote configuration and exit       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      RESULT CODE MODE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *RCn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Selects normal or Motorola result code      |
          |              | numbering.                                  |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í *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).                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           RETURN TO LEASED LINE FROM DIAL BACKUP           |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *LBn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | If modem is in dial backup mode, switches   |
          |              | to leased line operation. During leased     |
          |              | line operation with forced answer enabled;  |
          |              | modem waits for a dial backup call          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           SECURITY - REPORT BLOCK USER SETTINGS            |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $IBn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Reports security level and callback number  |
          |              | for block of ten consecutive numbers        |
          |              | starting with user number n. Command set by |
          |              | superuser (system administrator).           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              SECURITY - REPORT USER SETTINGS               |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $In [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Reports security level and callback number  |
          |              | for user n. A normal user may only check    |
          |              | his own settings                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      SECURITY DISABLE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $D=x [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Disables security for password x. $D?       |
          |              | queries setting                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      SECURITY ENABLE                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $E=x [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Enables security for password x. $E?        |
          |              | queries setting                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       SECURITY LEVEL                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $Ln=x [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Assigns security level x to user number n.  |
          |              | Command set by superuser (system            |
          |              | administrator)                              |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                       SECURITY RESET                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $DR[cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Resets security to its initial state. All   |
          |              | passwords are deleted. Not available for    |
          |              | remote configuration                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       SECURITY RESET                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $F=x$x [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Resets security to factory default          |
          |              | settings. x=superuser password              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       STORE PASSWORD                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $S=x [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Sets an empty password to location x. Only  |
          |              | effective when password memory is empty or  |
          |              | only has one password stored.               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    SUPERUSER PRIVILEGE                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $S=x [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Allows normal user to gain superuser status |
          |              | by entering superuser password x            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       SYSTEM STATUS                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $E? [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Queries system security status              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       TALK/DATA MODE                       |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *DAn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Selects talk or data mode.                  |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í *DA0    | Talk mode enabled.                          |
          |--------------+---------------------------------------------|
          |     *DA1     | Data mode enabled.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              TRANSMISSION LEVEL - LEASED-LINE              |
          |------------------------------------------------------------|
          | Type        | Configuration                                |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] TLn [cmds]                         |
          |-------------+----------------------------------------------|
          | Range       | 0-30                                         |
          |-------------+----------------------------------------------|
          | Unit        | -1 dBm                                       |
          |-------------+----------------------------------------------|
          | Description | Sets the signal level for transmission over  |
          |             | leased-lines                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             TRANSMISSION LEVEL - SWITCHED LINE             |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *TDn [cmds]                       |
          |--------------+---------------------------------------------|
          | Default:     | 9                                           |
          |--------------+---------------------------------------------|
          | Range:       | 9-30                                        |
          |--------------+---------------------------------------------|
          | Unit:        | -1 dBm                                      |
          |--------------+---------------------------------------------|
          | Description: | Sets the transmitted signal level when the  |
          |              | modem is connected to a switched phone      |
          |              | line.                                       |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                        USER REMOVAL                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $Rn [cmds]                        |
          |--------------+---------------------------------------------|
          | Range (n):   | 2 - 50                                      |
          |--------------+---------------------------------------------|
          | Description: | Removes user n from active status without   |
          |              | deleting user information. Command set by   |
          |              | superuser (system administrator). Superuser |
          |              | (user number 1) may not be removed from     |
          |              | system.                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        USER STATUS                         |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $S? [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Queries whether current user has normal or  |
          |              | superuser security status                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   V.32 HANDSHAKE OPTIONS                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *FTn [cmds]                       |
          |--------------+---------------------------------------------|
          | 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 RETRAIN SENSITIVITY                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *THn [cmds]                       |
          |--------------+---------------------------------------------|
          | 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-SPEED                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *ASn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Controls V.34 asymmetric bit rate           |
          |              | capability.                                 |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *AS0     | V.34 split-speed disabled.                  |
          |--------------+---------------------------------------------|
          |     *AS1     | V.34 split-speed enabled.                   |
          +------------------------------------------------------------+
       
                               S(status) REGISTERS
       
          +------------------------------------------------------------+
          |              AUTO-RELIABLE FALLBACK CHARACTER              |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S64=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character used as the              |
          |              | auto-reliable fallback character. S64=0     |
          |              | will disable this function.                 |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S14                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S14=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls echo, result codes and display,    |
          |              | dial mode, and answer/originate mode.       |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  1   |     0 | Command echo disabled                       |
          |      |       |                                             |
          |      |   í 1 | Command echo enabled                        |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Result codes enabled                        |
          |      |       |                                             |
          |      |     1 | Result codes disabled                       |
          |------+-------+---------------------------------------------|
          |  3   |     0 | Display result codes in numeric format      |
          |      |       |                                             |
          |      |   í 1 | Display result codes in verbose format      |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Smart mode                                  |
          |      |       |                                             |
          |      |     1 | Dumb mode                                   |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | Tone dial enabled                           |
          |      |       |                                             |
          |      |     1 | Pulse dial enabled                          |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Cleardown enabled                           |
          |      |       |                                             |
          |      |     1 | Cleardown disabled                          |
          |------+-------+---------------------------------------------|
          |  7   |     0 | Answer mode enabled                         |
          |      |       |                                             |
          |      |   í 1 | Originate mode enabled                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S21                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S21=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects CTS/DCD/DSR signals, low DTR        |
          |              | action, and the long space disconnect       |
          |              | function.                                   |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |  í 00 | DSR forced high                             |
          |      |       |                                             |
          |      |    10 | DSR normal                                  |
          |      |       |                                             |
          |      |    01 | DSR off 5 seconds after disconnect          |
          |      |       |                                             |
          |      |    11 | DSR follows off-hook                        |
          |------+-------+---------------------------------------------|
          |  1   |    00 | DCD forced high                             |
          |      |       |                                             |
          |      |  í 10 | DCD normal                                  |
          |      |       |                                             |
          |      |    01 | DCD off 5 seconds after disconnect          |
          |      |       |                                             |
          |      |    11 | DCD follows RTS                             |
          |------+-------+---------------------------------------------|
          |  2   |     0 | CTS follows RTS by S26 delay                |
          |      |       |                                             |
          |      |   í 1 | CTS forced high                             |
          |------+-------+---------------------------------------------|
          | 4, 3 |    00 | DTR signal ignored                          |
          |      |       |                                             |
          |      |    01 | Modem goes to command mode on low DTR       |
          |      |       |                                             |
          |      |  í 10 | Modem disconnects on low DTR; Auto-Answer   |
          |      |       | is disabled.                                |
          |      |    11 |                                             |
          |      |       | Modem is initialized on low DTR             |
          |------+-------+---------------------------------------------|
          |  5   |    00 | DCD forced high                             |
          |      |       |                                             |
          |      |  í 10 | DCD normal                                  |
          |      |       |                                             |
          |      |    01 | DCD off 5 seconds after disconnect          |
          |      |       |                                             |
          |      |    11 | DCD follows RTS                             |
          |------+-------+---------------------------------------------|
          |  6   |  í 00 | DSR forced high                             |
          |      |       |                                             |
          |      |    10 | DSR normal                                  |
          |      |       |                                             |
          |      |    01 | DSR off 5 seconds after disconnect          |
          |      |       |                                             |
          |      |    11 | DSR follows off-hook                        |
          |------+-------+---------------------------------------------|
          |  7   |     0 | Long space disconnect function disabled     |
          |      |       |                                             |
          |      |   í 1 | Long space disconnect function enabled      |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S23                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S23=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0-189                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Grants/denies remote digital loopback, and  |
          |              | sets guard tone.                            |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Remote digital loopback denied              |
          |      |       |                                             |
          |      |   í 1 | Remote digital loopback allowed             |
          |------+-------+---------------------------------------------|
          | 5 -  |     0 | Not used                                    |
          |  1   |       |                                             |
          |------+-------+---------------------------------------------|
          | 7, 6 |  í 00 | Guard tone disabled                         |
          |      |       |                                             |
          |      |    01 | Guard tone 550Hz enabled                    |
          |      |       |                                             |
          |      |    10 | Guard tone 1800Hz enabled                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S27                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S27=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 9                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 127                                     |
          |--------------+---------------------------------------------|
          | Description: | Selects sync/async mode, line type, clock   |
          |              | source, and ITU-T/Bell modes.               |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 1, 0 |  í 00 | Asynchronous command and data modes.        |
          |      |       |                                             |
          |      |    01 | Asynchronous command, synchronous connect   |
          |      |       | mode.                                       |
          |      |    10 |                                             |
          |      |       | DTR dialing enabled, synchronous connect    |
          |      |    11 | mode.                                       |
          |      |       |                                             |
          |      |       | Manual dialing only, synchronous connect    |
          |      |       | mode.                                       |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Switched line.                              |
          |      |       |                                             |
          |      |     1 | Leased line.                                |
          |------+-------+---------------------------------------------|
          |  3   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          | 5, 4 |  í 00 | Internal DTE transmit clock source.         |
          |      |       |                                             |
          |      |    01 | External DTE transmit clock source.         |
          |      |       |                                             |
          |      |    10 | Slave DTE transmit clock source.            |
          |------+-------+---------------------------------------------|
          |  6   |     0 | Asynchronous DTR dialing enabled.           |
          |      |       |                                             |
          |      |   í 1 | Asynchronous DTR dialing disabled.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S29                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S29=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 135                                     |
          |--------------+---------------------------------------------|
          | Description: | Controls command set, option retaining,     |
          |              | V.32 fast handshaking, and DTE fallback.    |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | AT command set enabled.                     |
          |      |       |                                             |
          |      |     1 | AT command set disabled.                    |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Modem will not reset on disconnect.         |
          |      |       |                                             |
          |      |     1 | Modem will reset on disconnect.             |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Normal V.32 handshake sequence.             |
          |      |       |                                             |
          |      |     1 | Training time is shortened by 2 seconds in  |
          |      |       | V.32 and V.32bis modes.                     |
          |------+-------+---------------------------------------------|
          | 6 -  |     0 | Not used.                                   |
          |  3   |       |                                             |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | DTE fallback disabled                       |
          |      |       |                                             |
          |      |     1 | DTE fallback enabled                        |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S32                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S32=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Description: | Controls leased line option, line current   |
          |              | disconnect, and dial backup                 |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | 2-wire leased line operation                |
          |      |       |                                             |
          |      |     1 | 4-wire leased line operation                |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Short line current disconnect               |
          |      |       |                                             |
          |      |     1 | Long line current disconnect                |
          |------+-------+---------------------------------------------|
          |  2   |     0 | Line current disconnect disabled            |
          |      |       |                                             |
          |      |   í 1 | Line current disconnect enabled             |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | Manual dial backup enabled                  |
          |      |       |                                             |
          |      |     1 | Automatic dial backup enabled               |
          |------+-------+---------------------------------------------|
          | 4-7  |     0 | Not used.                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S53                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S53=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Description: | Controls automatic rate adaption options    |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Rate renegotiation above initial connect    |
          |      |       | disabled                                    |
          |      |     1 |                                             |
          |      |       | Rate renegotiation above initial connect    |
          |      |       | enabled                                     |
          |------+-------+---------------------------------------------|
          |  1   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          | 3, 2 |  í 00 | Automatic rate adaption threshold disabled  |
          |      |       |                                             |
          |      |    01 | Modem will initiate retrain on low Bit      |
          |      |       | Error Rate (10-6)                           |
          |      |    10 |                                             |
          |      |       | Modem will initiate retrain on medium Bit   |
          |      |    11 | Error Rate (10-4)                           |
          |      |       |                                             |
          |      |       | Modem will initiate retrain on high Bit     |
          |      |       | Error Rate (10-2)                           |
          |------+-------+---------------------------------------------|
          |  4   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | Protocol negotiation status disabled        |
          |      |       |                                             |
          |      |     1 | Protocol negotiation status enabled         |
          |------+-------+---------------------------------------------|
          |  6   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Distinctive ring detection disabled         |
          |      |       |                                             |
          |      |     1 | Distinctive ring detection enabled          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S57                   |
          |------------------------------------------------------------|
          | Format:        | AT [cmds] S57=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Default:       | 0                                         |
          |----------------+-------------------------------------------|
          | Range:         | 0 - 33                                    |
          |----------------+-------------------------------------------|
          | Description:   | Controls result code format and busy out. |
          |------------------------------------------------------------|
          |   Bit    | Value |                Function                 |
          |----------+-------+-----------------------------------------|
          |    0     |   í 0 | Result code 15 is CONNECT 4800 and code |
          |          |       | 18 is CONNECT 9600 (standard).          |
          |          |     1 |                                         |
          |          |       | Result code 11 is CONNECT 4800 and code |
          |          |       | 12 is CONNECT 9600 (Motorola).          |
          |------------------------------------------------------------|
          |    4 - 1    |    0 | Not used.                             |
          |-------------+------+---------------------------------------|
          |      5      |  í 0 | Busy out during local analog loopback |
          |             |      | test disabled.                        |
          |             |    1 |                                       |
          |             |      | Busy out during local analog loopback |
          |             |      | test enabled.                         |
          |-------------+------+---------------------------------------|
          |    6, 7     |    0 | Not used.                             |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S60                   |
          |------------------------------------------------------------|
          | Format         | AT [cmds] S60=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Default:       | 67                                        |
          |----------------+-------------------------------------------|
          | Range:         | 0 - 255                                   |
          |----------------+-------------------------------------------|
          | Description:   | Controls auto-retrain, MNP, auto-reliable |
          |                | time buffering, RI signal, and extended   |
          |                | result codes.                             |
          |------------------------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Auto-retrain disabled.                      |
          |      |       |                                             |
          |      |   í 1 | Auto-retrain enabled.                       |
          |------+-------+---------------------------------------------|
          |  1   |     0 | MNP disabled.                               |
          |      |       |                                             |
          |      |   í 1 | MNP enabled.                                |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Data is discarded during auto-reliable      |
          |      |       | time.                                       |
          |      |     1 |                                             |
          |      |       | Data is buffered during auto-reliable time. |
          |------+-------+---------------------------------------------|
          | 5 -  |     0 | Not used.                                   |
          |  3   |       |                                             |
          |------+-------+---------------------------------------------|
          |  6   |     0 | RI signal high during rings, and forced     |
          |      |       | high for duration of call.                  |
          |      |   í 1 |                                             |
          |      |       | RI signal high during rings only.           |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Extended result codes disabled.             |
          |      |       |                                             |
          |      |     1 | Extended result codes enabled.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S70                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S70=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 15                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 15                                      |
          |--------------+---------------------------------------------|
          | Description: | Controls connect mode and V.42 negotiation  |
          |              | mode.                                       |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  2,  |   000 | Normal mode enabled.                        |
          | 1, 0 |       |                                             |
          |      |   001 | Direct mode enabled.                        |
          |      |       |                                             |
          |      |   010 | MNP mode only enabled.                      |
          |      |       |                                             |
          |      |   011 | MNP mode with fallback to normal mode       |
          |      |       | enabled.                                    |
          |      |   100 |                                             |
          |      |       | V.42 mode only enabled.                     |
          |      |   101 |                                             |
          |      |       | V.42 mode with fallback to normal mode      |
          |      |   110 | enabled.                                    |
          |      |       |                                             |
          |      | í 111 | V.42 mode with fallback to MNP enabled.     |
          |      |       |                                             |
          |      |       | V.42 mode with fallback to MNP and normal   |
          |      |       | modes enabled.                              |
          |------+-------+---------------------------------------------|
          |  3   |     0 | Normal V.42 handshaking enabled.            |
          |      |       |                                             |
          |      |   í 1 | Fast V.42 handshaking enabled.              |
          |------+-------+---------------------------------------------|
          | 7 -  |     0 | Not used                                    |
          |  4   |       |                                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S72                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S72=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 137                                     |
          |--------------+---------------------------------------------|
          | Description: | Controls serial port lock, CTS signal, and  |
          |              | auto-callback function.                     |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Serial speed locked.                        |
          |      |       |                                             |
          |      |     1 | Serial speed follows connect speed.         |
          |------+-------+---------------------------------------------|
          | 2, 1 |    00 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | CTS normal.                                 |
          |      |       |                                             |
          |      |     1 | CTS follows DCD.                            |
          |------+-------+---------------------------------------------|
          | 6 -  |     0 | Not used.                                   |
          |  4   |       |                                             |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Auto-callback disabled.                     |
          |      |       |                                             |
          |      |     1 | Auto-callback enabled.                      |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S82                   |
          |------------------------------------------------------------|
          | Format        | AT [cmds] S82=n [cmds]                     |
          |---------------+--------------------------------------------|
          | Description:  | Controls negotiation status                |
          |---------------+--------------------------------------------|
          |  Bit  | Value |                  Function                  |
          |-------+-------+--------------------------------------------|
          | 1 - 0 |     0 | Not used                                   |
          |-------+-------+--------------------------------------------|
          | 3 - 2 |    00 | Extended result codes disabled             |
          |       |       |                                            |
          |       |  í 01 | Extended result codes enabled              |
          |       |       |                                            |
          |       |    10 | Display DCE rate                           |
          |-------+-------+--------------------------------------------|
          | 7 - 4 |     0 | Not used                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S84                   |
          |------------------------------------------------------------|
          | Format        | AT [cmds] S84=n [cmds]                     |
          |---------------+--------------------------------------------|
          | Description:  | Enables/disables key abort                 |
          |---------------+--------------------------------------------|
          |  Bit  | Value |                  Function                  |
          |-------+-------+--------------------------------------------|
          |   0   |   í 0 | Key abort enabled                          |
          |       |       |                                            |
          |       |     1 | Key abort disabled                         |
          |-------+-------+--------------------------------------------|
          | 7 - 1 |     0 | Not used                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S95                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S95=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Description: | Controls non-linear coding, pre-emphasis,   |
          |              | shaping, and pre-coding.                    |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | V.8 answer disabled for modulations below   |
          |      |       | V.34.                                       |
          |      |   í 1 |                                             |
          |      |       | V.8 answer enabled for modulations below    |
          |      |       | V.34.                                       |
          |------+-------+---------------------------------------------|
          | 3 -  |     0 | Not used.                                   |
          |  1   |       |                                             |
          |------+-------+---------------------------------------------|
          |  4   |     0 | Non-linear coding disabled.                 |
          |      |       |                                             |
          |      |   í 1 | Non-linear coding enabled.                  |
          |------+-------+---------------------------------------------|
          |  5   |     0 | Pre-emphasis disabled.                      |
          |      |       |                                             |
          |      |   í 1 | Pre-emphasis enabled.                       |
          |------+-------+---------------------------------------------|
          |  6   |     0 | Constellation shaping disabled.             |
          |      |       |                                             |
          |      |   í 1 | Constellation shaping enabled.              |
          |------+-------+---------------------------------------------|
          |  7   |     0 | Pre-coding disabled.                        |
          |      |       |                                             |
          |      |   í 1 | Pre-coding enabled.                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S96                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S96=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 156                                     |
          |--------------+---------------------------------------------|
          | Description: | Controls TX level deviation and asymmetric  |
          |              | bit rates.                                  |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 4 -  |     0 | Not used.                                   |
          |  0   |       |                                             |
          |------+-------+---------------------------------------------|
          |  5   |     0 | Asymmetric bit rates disabled.              |
          |      |       |                                             |
          |      |   í 1 | Asymmetric bit rates enabled.               |
          |------+-------+---------------------------------------------|
          |  6   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  7   |     0 | TX level deviation disabled.                |
          |      |       |                                             |
          |      |   í 1 | TX level deviation enabled.                 |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S97                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S97=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 32                                      |
          |--------------+---------------------------------------------|
          | Description: | Controls automatic rate adaption options in |
          |              | V.34 mode                                   |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 0, 1 |    00 | V.34 threshold low (10-6 Bit Error Rate)    |
          |      |       |                                             |
          |      |    01 | V.34 threshold medium (10-4 Bit Error Rate) |
          |      |       |                                             |
          |      |  í 10 | V.34 threshold high (10-2 Bit Error Rate)   |
          |------+-------+---------------------------------------------|
          | 2—7  |     0 | Not used.                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        BREAK LENGTH                        |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S79=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 35                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | 20ms                                        |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of breaks sent from DCE to  |
          |              | DTE.                                        |
          +------------------------------------------------------------+
       
         +----------------------------------------------------------------+
         |                           BREAK TYPE                           |
         |----------------------------------------------------------------|
         |Type:             |Register                                     |
         |------------------+---------------------------------------------|
         |Format:           |AT [cmds] S59=n [cmds]                       |
         |------------------+---------------------------------------------|
         |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.       |            |            |
         |---------+---------------+------------+------------+------------|
         | í 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.        |
         +----------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                CHARACTER LENGTH AND PARITY                 |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S61? [cmds]                       |
          |--------------+---------------------------------------------|
          | Default:     | Read-only                                   |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 56                                      |
          |--------------+---------------------------------------------|
          | Description: | Reports current character length and        |
          |              | parity.                                     |
          |--------------+---------------------------------------------|
          | Bit  | Value |                   Meaning                   |
          |------+-------+---------------------------------------------|
          | 2 -  |     0 | Not used.                                   |
          |  0   |       |                                             |
          |------+-------+---------------------------------------------|
          |  3   |     0 | 7 bit character length set.                 |
          |      |       |                                             |
          |      |     1 | 8 bit character length set.                 |
          |------+-------+---------------------------------------------|
          | 5, 4 |    00 | MARK parity.                                |
          |      |       |                                             |
          |      |    01 | No parity.                                  |
          |      |       |                                             |
          |      |    10 | Odd parity.                                 |
          |      |       |                                             |
          |      |    11 | Even parity.                                |
          |------+-------+---------------------------------------------|
          | 7, 6 |     0 | Not used.                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        COMPRESSION                         |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT S56=n                                    |
          |--------------+---------------------------------------------|
          | Description: | Selects data compression.                   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    S56=0     | Data compression disabled.                  |
          |--------------+---------------------------------------------|
          |    S56=1     | Data compression enabled on transmit only.  |
          |--------------+---------------------------------------------|
          |   Í S56=2    | Data compression enabled on receive only.   |
          |--------------+---------------------------------------------|
          |   í S56=3    | Data compression enabled.                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |         COMPRESSION AND ERROR CORRECTION - CURRENT         |
          |------------------------------------------------------------|
          | Type:        | Register - read-only                        |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S71? [cmds]                       |
          |--------------+---------------------------------------------|
          | 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.                             |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                  CONNECTION SPEED DISPLAY                  |
          |------------------------------------------------------------|
          | Type:        | Register - read-only                        |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S67? [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Reports current connection speed.           |
          |--------------+---------------------------------------------|
          |    Value     |                   Meaning                   |
          |--------------+---------------------------------------------|
          |      1       | 300bps                                      |
          |--------------+---------------------------------------------|
          |      3       | 1200bps                                     |
          |--------------+---------------------------------------------|
          |      4       | 2400bps                                     |
          |--------------+---------------------------------------------|
          |      5       | 4800bps                                     |
          |--------------+---------------------------------------------|
          |      6       | 7200bps                                     |
          |--------------+---------------------------------------------|
          |      7       | 9600bps uncoded                             |
          |--------------+---------------------------------------------|
          |      8       | 9600bps trellis                             |
          |--------------+---------------------------------------------|
          |      9       | 12.0Kbps                                    |
          |--------------+---------------------------------------------|
          |      10      | 14.4Kbps                                    |
          |--------------+---------------------------------------------|
          |      11      | 16.8Kbps                                    |
          |--------------+---------------------------------------------|
          |      12      | 19.2Kbps                                    |
          |--------------+---------------------------------------------|
          |      13      | 21.6Kbps                                    |
          |--------------+---------------------------------------------|
          |      14      | 24.0Kbps                                    |
          |--------------+---------------------------------------------|
          |      15      | 26.4Kbps                                    |
          |--------------+---------------------------------------------|
          |      16      | 28.8Kbps                                    |
          |--------------+---------------------------------------------|
          |      17      | 31.2Kbps                                    |
          |--------------+---------------------------------------------|
          |      18      | 33.6Kbps                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CONNECTION SPEED LOWER LIMIT                |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S81=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Sets minimum allowed connection speed.      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    S81=0     | No minimum speed.                           |
          |--------------+---------------------------------------------|
          |   í S81=1    | No minimum speed.                           |
          |--------------+---------------------------------------------|
          |    S81=2     | 1200bps                                     |
          |--------------+---------------------------------------------|
          |    S81=3     | 2400bps                                     |
          |--------------+---------------------------------------------|
          |    S81=4     | 4800bps                                     |
          |--------------+---------------------------------------------|
          |    S81=5     | 9600bps uncoded                             |
          |--------------+---------------------------------------------|
          |    S81=6     | 9600bps trellis                             |
          |--------------+---------------------------------------------|
          |    S81=7     | 12.0Kbps                                    |
          |--------------+---------------------------------------------|
          |    S81=8     | 14.4Kbps                                    |
          |--------------+---------------------------------------------|
          |    S81=9     | 600bps                                      |
          |--------------+---------------------------------------------|
          |    S81=11    | 16.8Kbps                                    |
          |--------------+---------------------------------------------|
          |    S81=12    | 19.2Kbps                                    |
          |--------------+---------------------------------------------|
          |    S81=13    | 21.6Kbps                                    |
          |--------------+---------------------------------------------|
          |    S81=14    | 24.0Kbps                                    |
          |--------------+---------------------------------------------|
          |    S81=15    | 26.4Kbps                                    |
          |--------------+---------------------------------------------|
          |    S81=16    | 28.8Kbps                                    |
          |--------------+---------------------------------------------|
          |    S81=17    | 31.2Kbps                                    |
          |--------------+---------------------------------------------|
          |    S81=18    | 33.6Kbps                                    |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                CONNECTION SPEED UPPER LIMIT                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S69=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Sets maximum allowed connection speed.      |
          |--------------+---------------------------------------------|
          |    Value     |                  Function                   |
          |--------------+---------------------------------------------|
          |      0       | Rate selected by register S80               |
          |--------------+---------------------------------------------|
          |      1       | 300bps                                      |
          |--------------+---------------------------------------------|
          |      3       | 1200bps                                     |
          |--------------+---------------------------------------------|
          |      4       | 2400bps                                     |
          |--------------+---------------------------------------------|
          |      5       | 4800bps                                     |
          |--------------+---------------------------------------------|
          |      6       | 7200bps                                     |
          |--------------+---------------------------------------------|
          |      7       | 9600bps uncoded                             |
          |--------------+---------------------------------------------|
          |      8       | 9600bps trellis                             |
          |--------------+---------------------------------------------|
          |      9       | 12.0Kbps                                    |
          |--------------+---------------------------------------------|
          |      10      | 14.4Kbps                                    |
          |--------------+---------------------------------------------|
          |      11      | 16.8Kbps                                    |
          |--------------+---------------------------------------------|
          |      12      | 19.2Kbps                                    |
          |--------------+---------------------------------------------|
          |      13      | 21.6Kbps                                    |
          |--------------+---------------------------------------------|
          |      14      | 24.0Kbps                                    |
          |--------------+---------------------------------------------|
          |      15      | 26.4Kbps                                    |
          |--------------+---------------------------------------------|
          |      16      | 28.8Kbps                                    |
          |--------------+---------------------------------------------|
          |      17      | 31.2Kbps                                    |
          |--------------+---------------------------------------------|
          |     í 18     | 33.6Kbps                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAL BACKUP TIMER                      |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S28=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Default:     | 15                                          |
          |--------------+---------------------------------------------|
          | Unit:        | 1 minute                                    |
          |--------------+---------------------------------------------|
          | Description: | Specifies the amount of time the modem will |
          |              | remain in dial backup mode before retrying  |
          |              | leased line mode. S28=0 disables timer      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  DISCONNECT BUFFER DELAY                   |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S62=n [cmds]                      |
          |--------------+---------------------------------------------|
          | 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.                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DTR IGNORE TIME ON CONNECT                 |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S25=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Default:     | 5                                           |
          |--------------+---------------------------------------------|
          | Unit:        | 10ms                                        |
          |--------------+---------------------------------------------|
          | Description: | Sets the time the modem will ignore a low   |
          |              | DTR after a connection                      |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |        FLOW CONTROL CHARACTER - XOFF FROM TERMINAL         |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S45=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 19                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character the terminal sends to    |
          |              | represent XOFF.                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |         FLOW CONTROL CHARACTER - XOFF TO TERMINAL          |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S50=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 19                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character the modem sends to       |
          |              | represent XOFF.                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |         FLOW CONTROL CHARACTER - XON FROM TERMINAL         |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S44=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 17                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character the terminal sends to    |
          |              | represent XON.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          FLOW CONTROL CHARACTER - XON TO TERMINAL          |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S49=n [cmds]                      |
          |--------------+---------------------------------------------|
          | 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]                      |
          |--------------+---------------------------------------------|
          | Default:     | 33                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 123                                     |
          |--------------+---------------------------------------------|
          | Description: | Controls flow control type and              |
          |              | pass-through.                               |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 1, 0 |    00 | Flow control disabled.                      |
          |      |       |                                             |
          |      |    01 | Bidirectional XON/XOFF flow control         |
          |      |       | enabled.                                    |
          |      |    10 |                                             |
          |      |       | CTS flow control by DCE enabled.            |
          |      |  í 11 |                                             |
          |      |       | Bidirectional CTS/RTS flow control enabled. |
          |------+-------+---------------------------------------------|
          |  2   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | Flow control disabled.                      |
          |      |       |                                             |
          |      |     1 | Flow control enabled.                       |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | XON/XOFF signals trapped by local modem.    |
          |      |       |                                             |
          |      |     1 | XON/XOFF passed through local modem.        |
          |------+-------+---------------------------------------------|
          | 6, 5 |    00 | Flow control by DCE disabled.               |
          |      |       |                                             |
          |      |    01 | XON/XOFF flow control by DCE enabled.       |
          |      |       |                                             |
          |      |    10 | RTS flow control by DCE enabled.            |
          |      |       |                                             |
          |      |    11 | RTS flow control by DCE enabled.            |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                      INACTIVITY TIMER                      |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S58=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 minute                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of time the modem does not  |
          |              | receive information before it disconnects.  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 LEASED LINE BACKUP NUMBER                  |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S35=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Sets the stored number the modem will dial  |
          |              | for DTR dialing and leased-line backup.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              LOCAL SERIAL PORT SPEED DISPLAY               |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S80=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Reports the current serial port speed.      |
          |--------------+---------------------------------------------|
          |    Value     |                   Meaning                   |
          |--------------+---------------------------------------------|
          |      1       | 300bps                                      |
          |--------------+---------------------------------------------|
          |      2       | 600bps                                      |
          |--------------+---------------------------------------------|
          |      3       | 1200bps                                     |
          |--------------+---------------------------------------------|
          |      4       | 2400bps                                     |
          |--------------+---------------------------------------------|
          |      5       | 4800bps                                     |
          |--------------+---------------------------------------------|
          |      6       | 7200bps                                     |
          |--------------+---------------------------------------------|
          |      7       | 9600bps                                     |
          |--------------+---------------------------------------------|
          |      8       | 12.0Kbps                                    |
          |--------------+---------------------------------------------|
          |      9       | 14.4Kbps                                    |
          |--------------+---------------------------------------------|
          |      10      | 16.8Kbps                                    |
          |--------------+---------------------------------------------|
          |      11      | 19.2Kbps                                    |
          |--------------+---------------------------------------------|
          |      12      | 21.6Kbps                                    |
          |--------------+---------------------------------------------|
          |      13      | 24.0Kbps                                    |
          |--------------+---------------------------------------------|
          |      14      | 26.4Kbps                                    |
          |--------------+---------------------------------------------|
          |      15      | 28.8Kbps                                    |
          |--------------+---------------------------------------------|
          |      16      | 31.2Kbps                                    |
          |--------------+---------------------------------------------|
          |      17      | 33.6Kbps                                    |
          |--------------+---------------------------------------------|
          |      18      | 38.4Kbps                                    |
          |--------------+---------------------------------------------|
          |      19      | 57.6Kbps                                    |
          |--------------+---------------------------------------------|
          |      20      | 115.2Kbps                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |            MAXIMUM BLOCK SIZE FOR TRANSMISSION             |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S63=n [cmds]                      |
          |--------------+---------------------------------------------|
          | 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.           |
          |--------------+---------------------------------------------|
          |   í S63=3    | MNP block size is 256 characters.           |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                    MODULATION PROTOCOL                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S88=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Selects the protocol to use on the next     |
          |              | connection.                                 |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í S88=0    | Auto-detect fastest protocol                |
          |--------------+---------------------------------------------|
          |    S88=1     | V.21                                        |
          |--------------+---------------------------------------------|
          |    S88=2     | Bell 103                                    |
          |--------------+---------------------------------------------|
          |    S88=4     | Bell 212/A                                  |
          |--------------+---------------------------------------------|
          |    S88=5     | V.22bis                                     |
          |--------------+---------------------------------------------|
          |    S88=6     | V.27 (leased line only)                     |
          |--------------+---------------------------------------------|
          |    S88=8     | V.29 (leased line only)                     |
          |--------------+---------------------------------------------|
          |    S88=10    | V.33bis (leased line only)                  |
          |--------------+---------------------------------------------|
          |    S88=11    | V.32bis                                     |
          |--------------+---------------------------------------------|
          |    S88=12    | V.34.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                MODULATION PROTOCOL DISPLAY                 |
          |------------------------------------------------------------|
          | Type:        | Register - read-only                        |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S91? [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Returns a value indicating the current      |
          |              | protocol.                                   |
          |--------------+---------------------------------------------|
          |    Value     |                   Meaning                   |
          |--------------+---------------------------------------------|
          |      1       | V.21                                        |
          |--------------+---------------------------------------------|
          |      2       | Bell 103                                    |
          |--------------+---------------------------------------------|
          |      4       | Bell 212/A                                  |
          |--------------+---------------------------------------------|
          |      5       | V.22bis                                     |
          |--------------+---------------------------------------------|
          |      6       | V.27 (leased line only)                     |
          |--------------+---------------------------------------------|
          |      8       | V.29 (leased line only)                     |
          |--------------+---------------------------------------------|
          |      10      | V.33bis (leased line only)                  |
          |--------------+---------------------------------------------|
          |      11      | V.32bis                                     |
          |--------------+---------------------------------------------|
          |      12      | V.34.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           REMOTE CONFIGURATION ESCAPE CHARACTER            |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S41=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Default:     | 61                                          |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Selects the escape character for remote     |
          |              | configuration                               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              REMOTE CONFIGURATION GUARD TIME               |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S42=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Default:     | 50                                          |
          |--------------+---------------------------------------------|
          | Unit:        | 20ms                                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the guard time for remote           |
          |              | configuration                               |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                      RTS TO CTS DELAY                      |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S26=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | 10ms                                        |
          |--------------+---------------------------------------------|
          | Description: | Sets the duration of delay for CTS to       |
          |              | respond to RTS status change                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               SECURITY - AUTO-CALLBACK DELAY               |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S78=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 30                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Configures how long the modem will wait to  |
          |              | execute the auto-callback sequence after an |
          |              | incoming call is detected.                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 SECURITY - CALLBACK DELAY                  |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S74=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 15                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Determines how long the modem will wait to  |
          |              | execute a callback sequence after the user  |
          |              | has disconnected.                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 SECURITY - CALLBACK RETRY                  |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S75=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | 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]                      |
          |--------------+---------------------------------------------|
          | 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 - FAILED LOGIN ATTEMPT MAXIMUM           |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S77=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 attempt                                   |
          |--------------+---------------------------------------------|
          | Description: | Sets the maximum number of failed logins    |
          |              | the modem will accept until it disconnects. |
          |              | S77=0 disables                              |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                  SECURITY - PASSWORD TIME                  |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S73=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Determines how long the modem will wait for |
          |              | a password when in secure mode.             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         TEST MODES                         |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S34=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 15                                      |
          |--------------+---------------------------------------------|
          | Description: | Initiates and controls loopback test        |
          |              | options.                                    |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | End bidirectional local digital loopback    |
          |      |       | test.                                       |
          |      |     1 |                                             |
          |      |       | Begin bidirectional local digital loopback  |
          |      |       | test.                                       |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Pin 18 ignored                              |
          |      |       |                                             |
          |      |     1 | Pin 18 toggle initiates local analog        |
          |      |       | loopback test.                              |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | Pin 21 ignored                              |
          |      |       |                                             |
          |      |     1 | Pin 21 toggle initiates remote digital      |
          |      |       | loopback test.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               TRANSMISSION LEVEL - DIAL LINE               |
          |------------------------------------------------------------|
          | Type        | Register or Configuration                    |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S51=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Range       | 9-30                                         |
          |-------------+----------------------------------------------|
          | Unit        | -1 dBm                                       |
          |-------------+----------------------------------------------|
          | Description | Sets the signal level for dial line          |
          |             | transmissions                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              TRANSMISSION LEVEL - LEASED-LINE              |
          |------------------------------------------------------------|
          | Type        | Register or Configuration                    |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S52=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Range       | 0-30                                         |
          |-------------+----------------------------------------------|
          | Unit        | -1 dBm                                       |
          |-------------+----------------------------------------------|
          | Description | Sets the signal level for transmission over  |
          |             | leased-lines                                 |
          +------------------------------------------------------------+
       
           
       
           
       
          +------------------------------------------------------------+
          |                      V.25bis OPTIONS                       |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S30=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Description: | Controls V.25bis character set, VAL         |
          |              | response, NRZ/NRZI, and communications      |
          |              | mode.                                       |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Use ASCII character set.                    |
          |      |       |                                             |
          |      |     1 | Use EBCDIC character set.                   |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | VAL response enabled.                       |
          |      |       |                                             |
          |      |     1 | VAL response disabled.                      |
          |------+-------+---------------------------------------------|
          | 4, 3 |    00 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | Use NRZ mode.                               |
          |      |       |                                             |
          |      |     1 | Use NRZI mode.                              |
          |------+-------+---------------------------------------------|
          | 7, 6 |  í 00 | V.25bis command set disabled.               |
          |      |       |                                             |
          |      |    01 | V.25bis bisynchronous command, synchronous  |
          |      |       | connect mode.                               |
          |      |    10 |                                             |
          |      |       | V.25bis SDLC command, synchronous connect   |
          |      |    11 | mode.                                       |
          |      |       |                                             |
          |      |       | V.25bis asynchronous command, synchronous   |
          |      |       | connect mode.                               |
          +------------------------------------------------------------+