DIAMOND MULTIMEDIA SYSTEMS, INC.
================================

   SUPRAEXPRESS 56

   Card Type              Modem, Fax                              
   Chip Set               Rockwell                                
   Maximum Modem Rate     56Kbps                                  
   Maximum Fax Rate       14.4Kbps                                
   Data Modulation        Bell 103A/212A                          
   Protocol                                                       
                          ITU-T V.21, V.22, V.22bis, V.23, V.32,  
                          V.32bis, V.34                           
                                                                  
                          Rockwell 56K                            
   Fax Modulation         ITU-T V.17, V.21, V.27ter, V.29         
   Protocol               
   Error                  MNP5, V.42, V.42bis                     
   Correction/Compression 
   Fax Class              Class I                                 
   Data Bus               External                                

                                                            55028

   +------------------------------------------------------------+
   |                   SUPPORTED COMMAND SET                    |
   |------------------------------------------------------------|
   |                     Basic AT Commands                      |
   |------------------------------------------------------------|
   | AT, '+++', A/                                              |
   |------------------------------------------------------------|
   | A, B, D, E, H, M, N, O, P, T, V, W, X, Y, Z                |
   |------------------------------------------------------------|
   | &C, &P, &Q, &W, &Y, &Z                                     |
   |------------------------------------------------------------|
   |                    Extended AT Commands                    |
   |------------------------------------------------------------|
   | \N                                                         |
   |------------------------------------------------------------|
   | %C, %E, %G, %L                                             |
   |------------------------------------------------------------|
   |                        S Registers                         |
   |------------------------------------------------------------|
   | S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12,     |
   | S24, S25, S26, S29, S30, S32, S33, S38                     |
   |------------------------------------------------------------|
   |                      Special Commands                      |
   |------------------------------------------------------------|
   | #CID, +MS                                                  |
   |------------------------------------------------------------|
   | Note: See MHI Help File for full command documentation.    |
   +------------------------------------------------------------+

                     Proprietary AT Command Set

   +------------------------------------------------------------+
   |         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                        |
   +------------------------------------------------------------+

    

    

    

    

    

    

    

    

    

    

    

    

    

   +------------------------------------------------------------+
   |                 DATA TERMINAL READY (DTR)                  |
   |------------------------------------------------------------|
   | Type:         | Configuration                              |
   |---------------+--------------------------------------------|
   | Format:       | AT [cmds] &Dn [cmds]                       |
   |---------------+--------------------------------------------|
   | Description:  | Selects modem response to DTR              |
   |------------------------------------------------------------|
   |      Note: The action each variant of &D causes depends on |
   |      the setting of &Q                                     |
   |------------------------------------------------------------|
   |    &Q Setting    |   &D0   |   &D1   |   &D2   |    &D3    |
   |------------------+---------+---------+---------+-----------|
   | i &Q0, &Q5, &Q6  |  NONE   | Command | Command | Command 4 |
   |                  |         |    3    |    1    |           |
   |------------------+---------+---------+---------+-----------|
   |     &Q1, &Q4     | Command | Command | Command | Command 4 |
   |                  |    2    |    3    |    1    |           |
   |------------------+---------+---------+---------+-----------|
   |     &Q2, &Q3     | Command | Command | Command | Command 1 |
   |                  |    1    |    1    |    1    |           |
   |------------------------------------------------------------|
   |    Command    |                  Function                  |
   |---------------+--------------------------------------------|
   |  i Command 0  | Modem does not respond to DTR              |
   |---------------+--------------------------------------------|
   |   Command 1   | Modem goes to command mode after DTR goes  |
   |               | is off                                     |
   |---------------+--------------------------------------------|
   |   Command 2   | Modem goes to command mode and disconnects |
   |               | (hangs up) after DTR goes off; Auto-Answer |
   |               | is disabled.                               |
   |---------------+--------------------------------------------|
   |   Command 3   | Modem is initialized after DTR goes off    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  FACTORY DEFAULT PROFILE                   |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] &F [cmds]                         |
   |--------------+---------------------------------------------|
   | Description: | Sets values in active profile to values     |
   |              | found in the default profile                |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |    i &F0     | Restore factory (PC) configuration; with    |
   |              | hardware flow control, error correction,    |
   |              | and data compression enabled                |
   |--------------+---------------------------------------------|
   |     &F1      | Restore factory (Mac) default               |
   |              | configuration, with hardware flow control,  |
   |              | error correction, and data compression      |
   |              | enabled                                     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         FLASH ROM                          |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] ** [cmds]                         |
   |--------------+---------------------------------------------|
   | Description: | Set flash ROM code XMODEM upload mode       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        FLOW CONTROL                        |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] &Kn [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Enables flow control options                |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |     &K0      | Flow control disabled                       |
   |--------------+---------------------------------------------|
   |    i &K3     | RTS/CTS flow control enabled                |
   |--------------+---------------------------------------------|
   |     &K4      | XON/XOFF flow control enabled               |
   |--------------+---------------------------------------------|
   |     &K5      | Transparent XON/XOFF flow control enabled   |
   |--------------+---------------------------------------------|
   |     &K6      | Both RTS/CTS and XON/XOFF flow control      |
   |              | enabled                                     |
   +------------------------------------------------------------+

    

    

    

    

    

    

   +------------------------------------------------------------+
   |                    LINE SIGNAL QUALITY                     |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] %Q [cmds]                         |
   |--------------+---------------------------------------------|
   | Description: | Returns a value which indicates line signal |
   |              | quality                                     |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |     %Q0      | Connection statistics                       |
   |--------------+---------------------------------------------|
   |     %Q1      | Data transfer statistics                    |
   |--------------+---------------------------------------------|
   |     %Q2      | Data transfer stats                         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     REPORT INFORMATION                     |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] In [cmds]                         |
   |--------------+---------------------------------------------|
   | Description: | Displays information requested              |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |      I0      | Reports maximum data carrier rate           |
   |--------------+---------------------------------------------|
   |      I1      | Reports ROM checksum                        |
   |--------------+---------------------------------------------|
   |      I2      | Tests and reports ROM checksum              |
   |--------------+---------------------------------------------|
   |      I3      | Reports ROM code revision number            |
   |--------------+---------------------------------------------|
   |      I4      | Reports supported protocols, in encrypted   |
   |              | format                                      |
   |--------------+---------------------------------------------|
   |      I5      | Reports firmware copyright information      |
   |--------------+---------------------------------------------|
   |      I6      | Reports country code for country PSTN       |
   |              | signals                                     |
   |--------------+---------------------------------------------|
   |      I7      | Reports DSP model and version code          |
   |--------------+---------------------------------------------|
   |      I9      | PnP COMID string                            |
   |--------------+---------------------------------------------|
   |     I10      | Reports features supported by the modem     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        RESULT CODES                        |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] Qn [cmds]                         |
   |--------------+---------------------------------------------|
   | Description: | Enables modem to send result codes to the   |
   |              | DTE                                         |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |     i Q0     | Result code sending enabled                 |
   |--------------+---------------------------------------------|
   |      Q1      | Result code sending disabled                |
   |--------------+---------------------------------------------|
   |      Q2      | Enables result code sending on originate;   |
   |              | disable on answer                           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       SPEAKER VOLUME                       |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] Ln [cmds]                         |
   |--------------+---------------------------------------------|
   | Description: | Controls speaker volume                     |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |      L0      | Speaker disabled                            |
   |--------------+---------------------------------------------|
   |     i L2     | Medium volume setting                       |
   |--------------+---------------------------------------------|
   |      L3      | Highest volume setting                      |
   +------------------------------------------------------------+

                                  

                                  

                                  

                                  

                                  

                        Special AT Commands

   +------------------------------------------------------------+
   |                    COUNTRY CODE DISPLAY                    |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] *NC? [cmds]                       |
   |--------------+---------------------------------------------|
   | Description: | Display country codes and configurations    |
   |              | supported                                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    COUNTRY CODES SELECT                    |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] *NCn [cmds]                       |
   |--------------+---------------------------------------------|
   | Description: | Select country code                         |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |    *NC000    | United States                               |
   |--------------+---------------------------------------------|
   |    *NC001    | Austria                                     |
   |--------------+---------------------------------------------|
   |    *NC002    | Belgium                                     |
   |--------------+---------------------------------------------|
   |    *NC003    | Denmark                                     |
   |--------------+---------------------------------------------|
   |    *NC004    | Finland                                     |
   |--------------+---------------------------------------------|
   |    *NC005    | France                                      |
   |--------------+---------------------------------------------|
   |    *NC006    | Germany                                     |
   |--------------+---------------------------------------------|
   |    *NC007    | Ireland                                     |
   |--------------+---------------------------------------------|
   |    *NC008    | Italy                                       |
   |--------------+---------------------------------------------|
   |    *NC010    | Netherlands                                 |
   |--------------+---------------------------------------------|
   |    *NC011    | Norway                                      |
   |--------------+---------------------------------------------|
   |    *NC012    | Portugal                                    |
   |--------------+---------------------------------------------|
   |    *NC013    | Spain                                       |
   |--------------+---------------------------------------------|
   |    *NC014    | Sweden                                      |
   |--------------+---------------------------------------------|
   |    *NC015    | Switzerland                                 |
   |--------------+---------------------------------------------|
   |    *NC016    | United Kingdom                              |
   |--------------+---------------------------------------------|
   |    *NC017    | Greece                                      |
   |--------------+---------------------------------------------|
   |    *NC022    | United States                               |
   |--------------+---------------------------------------------|
   |    *NC040    | Australia                                   |
   |--------------+---------------------------------------------|
   |    *NC043    | Japan                                       |
   |--------------+---------------------------------------------|
   |    *NC047    | Singapore                                   |
   |--------------+---------------------------------------------|
   |    *NC060    | South Africa                                |
   |--------------+---------------------------------------------|
   |    *NC061    | Korea                                       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       DIALING CODES                        |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] *Zn [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Change dialing codes                        |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |     *Z0      | Use dial code 0                             |
   |--------------+---------------------------------------------|
   |     *Z1      | Use dial code 1                             |
   +------------------------------------------------------------+

                                  

                                  

                                  

                        S(status) -REGISTERS

   +------------------------------------------------------------+
   |                  AUTOMATIC RATE ADAPTION                   |
   |------------------------------------------------------------|
   | Type:        | Register                                    |
   |--------------+---------------------------------------------|
   | Format       | AT [cmds] S191=n [cmds]                     |
   |--------------+---------------------------------------------|
   | Default:     | 128                                         |
   |--------------+---------------------------------------------|
   | Range:       | 0-255                                       |
   |--------------+---------------------------------------------|
   | Description: | Sets the automatic rate adaption bias       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  BIT-MAPPED REGISTER S27                   |
   |------------------------------------------------------------|
   | Format       | AT [cmds] S27=n [cmds]                      |
   |--------------+---------------------------------------------|
   | Default:     | Unidentified                                |
   |--------------+---------------------------------------------|
   | Range:       | 0-111                                       |
   |--------------+---------------------------------------------|
   | Unit:        | Bit-mapped                                  |
   |--------------+---------------------------------------------|
   | Description: | Selects synchronous/asynchronous mode, line |
   |              | type, clock source, and ITU-T/Bell modes.   |
   |--------------+---------------------------------------------|
   | Bit  | Value |                  Function                   |
   |------+-------+---------------------------------------------|
   |  0   |     0 | &M0/&Q0                                     |
   |      |       |                                             |
   |      |     1 | &Q4                                         |
   |------+-------+---------------------------------------------|
   |  0   |  1, 0 | &M2/&Q2                                     |
   |      |       |                                             |
   |      |  1, 1 | &Q6                                         |
   |------+-------+---------------------------------------------|
   |  1   |  0, 0 | &M1/&Q1                                     |
   |      |       |                                             |
   |      |  0, 1 | &Q5                                         |
   |------+-------+---------------------------------------------|
   |  2   |     0 | Dial up line                                |
   |      |       |                                             |
   |      |     1 | Leased line                                 |
   |------+-------+---------------------------------------------|
   |  4   |     0 | Internal sync clock select                  |
   |      |       |                                             |
   |      |     1 | external sync clock select                  |
   |------+-------+---------------------------------------------|
   |  6   |     0 | ITU                                         |
   |      |       |                                             |
   |      |     1 | Bell                                        |
   |------+-------+---------------------------------------------|
   |  7   |   128 | Reserved                                    |
   +------------------------------------------------------------+

    

    

    

    

    

    

    

    

    

    

    

    

    

    

    

    

    

    

   +------------------------------------------------------------+
   |                  CONNECTION FAILURE CODES                  |
   |------------------------------------------------------------|
   | Type:        | Register                                    |
   |--------------+---------------------------------------------|
   | Format       | AT [cmds] S86? [cmds]                       |
   |--------------+---------------------------------------------|
   | Description: | Reports codes which correspond to the       |
   |              | possible causes of a connection failure     |
   |--------------+---------------------------------------------|
   |    Value     |                   Meaning                   |
   |--------------+---------------------------------------------|
   |      0       | Normal hang up                              |
   |--------------+---------------------------------------------|
   |    1 - 3     | No failure - normal hang-up after fax       |
   |              | connection                                  |
   |--------------+---------------------------------------------|
   |      4       | Carrier signal lost                         |
   |--------------+---------------------------------------------|
   |      5       | No error-control detected for remote modem  |
   |              | during feature negotiation                  |
   |--------------+---------------------------------------------|
   |      6       | Remote modem failed to respond to feature   |
   |              | negotiation                                 |
   |--------------+---------------------------------------------|
   |      7       | Local modem is asynchronous-only, remote    |
   |              | modem is synchronous-only                   |
   |--------------+---------------------------------------------|
   |      8       | No common framing technique found           |
   |--------------+---------------------------------------------|
   |      9       | No common protocol found                    |
   |--------------+---------------------------------------------|
   |      10      | Remote modem sent erroneous feature         |
   |              | negotiation message                         |
   |--------------+---------------------------------------------|
   |      11      | Remote modem failed to send synchronous     |
   |              | information                                 |
   |--------------+---------------------------------------------|
   |      12      | No failure - remote modem disconnected      |
   |              | normally                                    |
   |--------------+---------------------------------------------|
   |      13      | Remote modem failed to respond after 10     |
   |              | re-transmissions same message               |
   |--------------+---------------------------------------------|
   |      14      | Violation of negotiated protocol caused     |
   |              | failure                                     |
   |--------------+---------------------------------------------|
   |      15      | Negotiated compression failed               |
   |--------------+---------------------------------------------|
   |      16      | Line speeds selected in S37 and S109 did    |
   |              | not match                                   |
   |--------------+---------------------------------------------|
   |      17      | Time limit reached according to parameters  |
   |              | set in S116                                 |
   |--------------+---------------------------------------------|
   |      18      | Time limit reached according to parameters  |
   |              | set in S30                                  |
   |--------------+---------------------------------------------|
   |      19      | Long Space Disconnect (Y1) time limit       |
   |              | reached                                     |
   |--------------+---------------------------------------------|
   |      20      | Key abort                                   |
   |--------------+---------------------------------------------|
   |      21      | V.42bis protocol violation                  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      DISPLAY CONTROL                       |
   |------------------------------------------------------------|
   | Type:          | Register                                  |
   |----------------+-------------------------------------------|
   | Format:        | AT [cmds] S201=n [cmds]                   |
   |----------------+-------------------------------------------|
   | Description:   | Controls the display                      |
   |------------------------------------------------------------|
   |   Bit   | Value |                 Function                 |
   |---------+-------+------------------------------------------|
   |    0    |     0 | Carrier statistics disabled              |
   |         |       |                                          |
   |         |     1 | Carrier statistics enabled               |
   |------------------------------------------------------------|
   |      1       |   | REJ or SREJ from occurrence is also     |
   |              |   | shown                                   |
   |--------------+---+-----------------------------------------|
   |      2       |   | Reserved                                |
   |--------------+---+-----------------------------------------|
   |      3       | 0 | Rate re-negotiation display disabled    |
   |              |   |                                         |
   |              | 1 | Rate re-negotiation display enabled     |
   |--------------+---+-----------------------------------------|
   |      4       | 0 | Demo mode disabled                      |
   |--------------+---+-----------------------------------------|
   |      5       | 0 | LCD/LED update time fast                |
   |              |   |                                         |
   |              | 1 | LCD/LED update time slow                |
   |--------------+---+-----------------------------------------|
   |      6       |   | Reserved                                |
   |--------------+---+-----------------------------------------|
   |      7       |   | Reserved                                |
   +------------------------------------------------------------+

    

    

    

    

    

   +------------------------------------------------------------+
   |                      DISPLAY CONTROL                       |
   |------------------------------------------------------------|
   | Type:        | Register                                    |
   |--------------+---------------------------------------------|
   | Format       | AT [cmds] S194=n [cmds]                     |
   |--------------+---------------------------------------------|
   | Unit:        | Bit-mapped                                  |
   |--------------+---------------------------------------------|
   | Description: | Sets the display control                    |
   |--------------+---------------------------------------------|
   | Bit  | Value |                  Function                   |
   |------+-------+---------------------------------------------|
   |  0   |     1 | Display basic mode                          |
   |------+-------+---------------------------------------------|
   |  1   |     2 | Carrier stats, issue ATZ after clearing     |
   |      |       | this command to return to normal operation  |
   |------+-------+---------------------------------------------|
   |  2   |     4 | Reserved                                    |
   |------+-------+---------------------------------------------|
   |  3   |     0 | Rate renegotiation display disabled         |
   |      |       |                                             |
   |      |     1 | Rate renegotiation display enabled          |
   |------+-------+---------------------------------------------|
   |  4   |    16 | Demo mode disabled                          |
   |------+-------+---------------------------------------------|
   |  5   |     0 | LCD/LED Dwell time fast                     |
   |      |       |                                             |
   |      |     1 | LCD/LED Dwell time slow                     |
   |------+-------+---------------------------------------------|
   |  6   |    64 | Reserved                                    |
   |------+-------+---------------------------------------------|
   |  7   |   128 | Reserved                                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                ERROR CORRECTION NEGOTIATION                |
   |------------------------------------------------------------|
   | Type:        | Register                                    |
   |--------------+---------------------------------------------|
   | Format       | AT [cmds] S36=n [cmds]                      |
   |--------------+---------------------------------------------|
   | Description: | Selects the action of the modem if it fails |
   |              | to connect with the error-correction        |
   |              | protocol set in &Q.                         |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |    S36=0     | Hang up                                     |
   |--------------+---------------------------------------------|
   |    S36=1     | Attempt a direct connection                 |
   |--------------+---------------------------------------------|
   |    S36=3     | Reserved                                    |
   |--------------+---------------------------------------------|
   |    S36=4     | Attempt a connection at MNP2-4; if that     |
   |              | fails, hang up.                             |
   |--------------+---------------------------------------------|
   |    S36=5     | Attempt a connection at MNP2-4; if that     |
   |              | fails, attempt a direct connection.         |
   |--------------+---------------------------------------------|
   |    S36=6     | Reserved                                    |
   |--------------+---------------------------------------------|
   |   i S36=7    | Attempt a connection at MNP2-4; if that     |
   |              | fails, attempt a buffered connection.       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   EXTENDED RESULT CODES                    |
   |------------------------------------------------------------|
   | Type:        | Register                                    |
   |--------------+---------------------------------------------|
   | Format       | AT [cmds] S95=n [cmds]                      |
   |--------------+---------------------------------------------|
   | Default:     | 0                                           |
   |--------------+---------------------------------------------|
   | Range:       | 0-255                                       |
   |--------------+---------------------------------------------|
   | Unit:        | Bit-mapped                                  |
   |--------------+---------------------------------------------|
   | Description: | Works in combination with the Wn command to |
   |              | enable extended result codes. Features      |
   |              | enabled by S95 take precedence over the     |
   |              | options selected by Wn.                     |
   |--------------+---------------------------------------------|
   | Bit  | Value |                  Function                   |
   |------+-------+---------------------------------------------|
   |  0   |     1 | CONNECT XXXX result code indicates DCE to   |
   |      |       | DCE rate instead of DTE to DTE rate         |
   |------+-------+---------------------------------------------|
   |  1   |     2 | Append/ARQ to CONNECT result code if EC is  |
   |      |       | active                                      |
   |------+-------+---------------------------------------------|
   |  2   |     4 | Enable CARRIER XXXX result code             |
   |------+-------+---------------------------------------------|
   |  3   |     8 | Enable PROTOCOL XXXX result code            |
   |------+-------+---------------------------------------------|
   |  4   |    16 | Undefined                                   |
   |------+-------+---------------------------------------------|
   |  5   |    32 | Enable compression result code              |
   |------+-------+---------------------------------------------|
   |  6   |    64 | Enable TX and RX V.34 CARRIER result code   |
   |      |       | if in asymmetric carrier mode               |
   |------+-------+---------------------------------------------|
   |  7   |   128 | Enable RINGING result code for ringback     |
   |      |       | detection                                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        MINIMUM EQM                         |
   |------------------------------------------------------------|
   | Type:        | Register                                    |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] S190=n [cmds]                     |
   |--------------+---------------------------------------------|
   | Default:     | 20                                          |
   |--------------+---------------------------------------------|
   | Range:       | 10-255                                      |
   |--------------+---------------------------------------------|
   | Unit:        | seconds                                     |
   |--------------+---------------------------------------------|
   | Description: | Sets the minimum "good" EQM                 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PnP FUNCTION CONTROL                 |
   |------------------------------------------------------------|
   | Type:        | Register                                    |
   |--------------+---------------------------------------------|
   | Format       | AT [cmds] S193=n [cmds]                     |
   |--------------+---------------------------------------------|
   | Description: | Controls serial PnP function                |
   |--------------+---------------------------------------------|
   | Bit  | Value |                  Function                   |
   |------+-------+---------------------------------------------|
   |  0   |     0 | Serial PnP saved to NVRAM disabled          |
   |      |       |                                             |
   |      |     1 | Serial PnP saved to NVRAM enabled           |
   |------+-------+---------------------------------------------|
   |  1   |       | Reserved                                    |
   |------+-------+---------------------------------------------|
   |  2   |       | Reserved                                    |
   |------+-------+---------------------------------------------|
   |  3   |       | Reserved                                    |
   |------+-------+---------------------------------------------|
   |  4   |       | Reserved                                    |
   |------+-------+---------------------------------------------|
   |  5   |       | Reserved                                    |
   |------+-------+---------------------------------------------|
   |  6   |       | Reserved                                    |
   |------+-------+---------------------------------------------|
   |  7   |       | Reserved                                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  SPECIAL FUNCTION CONTROL                  |
   |------------------------------------------------------------|
   | Type:        | Register                                    |
   |--------------+---------------------------------------------|
   | Format       | AT [cmds] S192=n [cmds]                     |
   |--------------+---------------------------------------------|
   | Unit:        | Bit-mapped                                  |
   |--------------+---------------------------------------------|
   | Description: | Controls the special functions              |
   |--------------+---------------------------------------------|
   | Bit  | Value |                  Function                   |
   |------+-------+---------------------------------------------|
   |  0   |     0 | Silent answer snoop mode                    |
   |      |       |                                             |
   |      |     1 | Standard                                    |
   |      |       |                                             |
   |      |       | Fast                                        |
   |------+-------+---------------------------------------------|
   |  1   |     0 | Adaptive answer mode                        |
   |      |       |                                             |
   |      |     1 | Attempt data carrier first, switch to fax   |
   |      |       | mode if not successful                      |
   |      |       |                                             |
   |      |       | Attempt data carrier first, switch to fax   |
   |      |       | mode if only CNG tone detected              |
   |------+-------+---------------------------------------------|
   |  2   |     0 | V.34 transmitter power reduction based on   |
   |      |       | INFO1 sequence disabled                     |
   |      |     1 |                                             |
   |      |       | V.34 transmitter power reduction based on   |
   |      |       | INFO1 sequence enabled                      |
   |------+-------+---------------------------------------------|
   |  3   |     0 | V.34 phase 4 TRN period disabled            |
   |      |       |                                             |
   |      |     1 | V.34 phase 4 TRN period enabled             |
   |------+-------+---------------------------------------------|
   |  4   |     0 | V.34 rate limiting after connection         |
   |      |       | disabled                                    |
   |      |     1 |                                             |
   |      |       | V.34 rate limiting after connection enabled |
   |------+-------+---------------------------------------------|
   |  5   |     0 | V.34 EQM threshold reduction for 3000 and   |
   |      |       | 3429 symbol rates disabled                  |
   |      |     1 |                                             |
   |      |       | V.34 EQM threshold reduction for 3000 and   |
   |      |       | 3429 symbol rates enabled                   |
   |------+-------+---------------------------------------------|
   |  6   |     0 | No action when possible false V.34 carrier  |
   |      |       | is detected                                 |
   |      |     1 |                                             |
   |      |       | Retrain when possible false V.34 carrier is |
   |      |       | detected                                    |
   |------+-------+---------------------------------------------|
   |  7   |     0 | Silent answer reason code off               |
   |      |       |                                             |
   |      |     1 | Silent answer reason code on                |
   +------------------------------------------------------------+

                        V.25bis COMMAND SET

   +------------------------------------------------------------+
   |                 CALL REQUEST WITH ADDRESS                  |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | CRSn                                        |
   |--------------+---------------------------------------------|
   | Description: | Dials the number stored in memory register  |
   |              | n                                           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CALL REQUESTED NUMBER                    |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | CRN<#>                                      |
   |--------------+---------------------------------------------|
   | Description: | Dials the number given; it will ignore      |
   |              | spaces and hyphens in the string; if the    |
   |              | string is more than fifty characters long,  |
   |              | a result of INV will be returned.           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CONNECT INCOMING CALLS                   |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | CIC                                         |
   |--------------+---------------------------------------------|
   | Description: | Instructs the modem to answer an incoming   |
   |              | call; if no call is currently incoming, a   |
   |              | result of INV will be returned.             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  DISREGARD INCOMING CALL                   |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | DIC                                         |
   |--------------+---------------------------------------------|
   | Description: | Instructs the modem to ignore the incoming  |
   |              | call, if the modem is set to automatically  |
   |              | answer; if no call is currently incoming, a |
   |              | result of INV will be returned.             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       PROGRAM NUMBER                       |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | PRNn;<#> or PRNn                            |
   |--------------+---------------------------------------------|
   | Description: | Stores a phone number in memory address n;  |
   |              | if the number is more than fifty characters |
   |              | long, a result of INV will be returned. If  |
   |              | the second form of this command is issued   |
   |              | (i.e. with no string to store), it will     |
   |              | clear memory address n.                     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              REQUEST LIST OF DELAYED NUMBERS               |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | RLD                                         |
   |--------------+---------------------------------------------|
   | Description: | Requests the list of delayed numbers from   |
   |              | the modem; this is a list of numbers that   |
   |              | the modem attempted to call and failed, and |
   |              | is not allowed to call again until a set    |
   |              | amount of time has elapsed; this is usually |
   |              | to prevent repeated dialing of a number     |
   |              | (which could indicate an attempted security |
   |              | breach.) If this feature is not enabled,    |
   |              | the modem will return INV.                  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             REQUEST LIST OF FORBIDDEN NUMBERS              |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | RLF                                         |
   |--------------+---------------------------------------------|
   | Description: | Requests the list of forbidden numbers from |
   |              | the modem; the modem is unable to dial      |
   |              | numbers on this list until its power has    |
   |              | been cycled; if this feature is not         |
   |              | enabled, the modem will return INV.         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   REQUEST LISTED NUMBERS                   |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | RLI                                         |
   |--------------+---------------------------------------------|
   | Description: | Requests the modem to return the list of    |
   |              | stored numbers; if no numbers are stored,   |
   |              | the modem will return LSN.                  |
   +------------------------------------------------------------+

                   STANDARD AT# VOICE COMMAND SET

   +------------------------------------------------------------+
   |                      DISTINCTIVE RING                      |
   |------------------------------------------------------------|
   | Format:         | AT [cmds] -SDR=n [cmds]                  |
   |-----------------+------------------------------------------|
   | Default:        | Unidentified                             |
   |-----------------+------------------------------------------|
   | Range:          | 0 - 7                                    |
   |-----------------+------------------------------------------|
   | Description:    | Selects which distinctive ring signals   |
   |                 | the modem will respond to.               |
   |------------------------------------------------------------|
   |   Bit    | Value |                Function                 |
   |----------+-------+-----------------------------------------|
   |    0     |     0 | Do not respond to distinctive ring type |
   |          |       | 1.                                      |
   |          |     1 |                                         |
   |          |       | Respond to distinctive ring type 1.     |
   |------------------------------------------------------------|
   |      1       |  2 | Enables double rings and reports these |
   |              |    | as RING 2 0.8s on, 0.4s off, 0.8s on,  |
   |              |    | 0.4s off                               |
   |--------------+----+----------------------------------------|
   |      2       |  4 | Enables triple rings and reports these |
   |              |    | as RING 3 0.4s on, 0.2s off, 0.2s off, |
   |              |    | 4.0s off                               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        LCD DISPLAYS                        |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] #LCDn [cmds]                      |
   |--------------+---------------------------------------------|
   | Description: | Controls whether the DTE will allow the     |
   |              | modem to send a 1300Hz calling tone when    |
   |              | originating                                 |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |    #LCD0     | "STRING mode disabled                       |
   |--------------+---------------------------------------------|
   |    #LCD1     | "STRING string is displayed on LCD line 1   |
   |--------------+---------------------------------------------|
   |    #LCD2     | "STRING string is displayed on LCD line 2   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       MODE SELECTION                       |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] #CLS=n [cmds]                     |
   |--------------+---------------------------------------------|
   | Description: | Selects which mode the modem will operate   |
   |              | in.                                         |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |    #CLS=0    | Modem will operate in data mode.            |
   |--------------+---------------------------------------------|
   |    #CLS=1    | Modem will operate in fax class I mode.     |
   |--------------+---------------------------------------------|
   |    #CLS=2    | Modem will operate in fax class II mode.    |
   |--------------+---------------------------------------------|
   |    #CLS=8    | Modem will operate in voice mode.           |
   +------------------------------------------------------------+

    

    

    

    

    

    

    

   +------------------------------------------------------------+
   |              SELECT DATA, FAX, OR VOICE/AUDIO              |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] #CLSn [cmds]                      |
   |--------------+---------------------------------------------|
   | Description: | Selects data, fax, or voice/audio           |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |    #CLS0     | Select data mode                            |
   |--------------+---------------------------------------------|
   |    #CLS1     | Select class 1 fax                          |
   |--------------+---------------------------------------------|
   |    #CLS2     | Select class 2 fax                          |
   |--------------+---------------------------------------------|
   |    #CLS8     | Select voice/audio mode                     |
   |--------------+---------------------------------------------|
   |    #CLS8     | Select online voice command mode            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     TOTAL VOLUME GAIN                      |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] L:nn [cmds]                       |
   |--------------+---------------------------------------------|
   | Description: | Sets the total volume gain adjustment       |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |   i L:=00    | Lowest gain                                 |
   |--------------+---------------------------------------------|
   |    L:=31     | Highest gain                                |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        VOICE DEVICE                        |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] #VLS=n [cmds]                     |
   |--------------+---------------------------------------------|
   | Description: | Selects the I/O device for the DSP chip.    |
   |--------------+---------------------------------------------|
   | Note:        | This modem may not support all options      |
   |              | listed below. The #VLS? Command will        |
   |              | display the available options.              |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |   i #VLS=0   | Telephone line and handset used for voice   |
   |              | I/O.                                        |
   |--------------+---------------------------------------------|
   |    #VLS=1    | Telephone handset used for voice I/O.       |
   |--------------+---------------------------------------------|
   |    #VLS=2    | Internal speaker only used for voice I/O.   |
   |--------------+---------------------------------------------|
   |    #VLS=3    | External microphone only used for voice     |
   |              | I/O.                                        |
   |--------------+---------------------------------------------|
   |    #VLS=4    | Telephone line and handset used for voice   |
   |              | I/O; internal speaker enabled.              |
   |--------------+---------------------------------------------|
   |    #VLS=5    | Headset used for voice I/O.                 |
   |--------------+---------------------------------------------|
   |    #VLS=6    | Speakerphone used for voice I/O.            |
   |--------------+---------------------------------------------|
   |    #VLS=7    | Handset muted by disconnecting handset or   |
   |              | speakerphone from telephone line.           |
   |--------------+---------------------------------------------|
   |    #VLS=8    | Connects caller ID relay for recording of   |
   |              | conversation over handset.                  |
   |--------------+---------------------------------------------|
   |    #VLS=9    | Connects handset (or speakerphone) to DSP   |
   |              | chip for recording or playback.             |
   +------------------------------------------------------------+

    

    

    

    

    

    

    

    

    

    

    

   +------------------------------------------------------------+
   |                        VOICE DEVICE                        |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] #VLS=n [cmds]                     |
   |--------------+---------------------------------------------|
   | Description: | Selects the I/O device for the DSP chip.    |
   |--------------+---------------------------------------------|
   | Note:        | This modem may not support all options      |
   |              | listed below. The #VLS? Command will        |
   |              | display the available options.              |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |   i #VLS=0   | Telephone line and handset used for voice   |
   |              | I/O.                                        |
   |--------------+---------------------------------------------|
   |    #VLS=1    | Telephone handset used for voice I/O.       |
   |--------------+---------------------------------------------|
   |    #VLS=2    | Internal speaker only used for voice I/O.   |
   |--------------+---------------------------------------------|
   |    #VLS=3    | External microphone only used for voice     |
   |              | I/O.                                        |
   |--------------+---------------------------------------------|
   |    #VLS=4    | Telephone line and handset used for voice   |
   |              | I/O; internal speaker enabled.              |
   |--------------+---------------------------------------------|
   |    #VLS=5    | Headset used for voice I/O.                 |
   |--------------+---------------------------------------------|
   |    #VLS=6    | Speakerphone used for voice I/O.            |
   |--------------+---------------------------------------------|
   |    #VLS=7    | Handset muted by disconnecting handset or   |
   |              | speakerphone from telephone line.           |
   |--------------+---------------------------------------------|
   |    #VLS=8    | Connects caller ID relay for recording of   |
   |              | conversation over handset.                  |
   |--------------+---------------------------------------------|
   |    #VLS=9    | Connects handset (or speakerphone) to DSP   |
   |              | chip for recording or playback.             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   VOICE RING DETECT TIME                   |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] #VRN=n [cmds]                     |
   |--------------+---------------------------------------------|
   | Default:     | Unidentified                                |
   |--------------+---------------------------------------------|
   | Range:       | Unidentified                                |
   |--------------+---------------------------------------------|
   | Unit:        | Unidentified                                |
   |--------------+---------------------------------------------|
   | Description: | Sets the maximum time the modem will wait   |
   |              | for the remote station to ring before it    |
   |              | assumes that it went off-hook before it     |
   |              | rang.                                       |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |   i #VLS=0   | Disables the "ringback never came timer"    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   VOICE RING DETECT TIME                   |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] #VRN=n [cmds]                     |
   |--------------+---------------------------------------------|
   | Default:     | Unidentified                                |
   |--------------+---------------------------------------------|
   | Range:       | Unidentified                                |
   |--------------+---------------------------------------------|
   | Unit:        | Unidentified                                |
   |--------------+---------------------------------------------|
   | Description: | Sets the maximum time the modem will wait   |
   |              | for the remote station to ring before it    |
   |              | assumes that it went off-hook before it     |
   |              | rang.                                       |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |   i #VRN=0   | Turns off the ringback never came timer.    |
   |              | After dialing the modem sends VCON and      |
   |              | immediately enters online voice command     |
   |              | control                                     |
   +------------------------------------------------------------+

                                  

                                  

                                  

                                  

                                  

                                  

                                  

                        V.25ter AT COMMANDS

   +------------------------------------------------------------+
   |                  ERROR CONTROL SELECTION                   |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] +ESn, m, o, [cmds]                |
   |--------------+---------------------------------------------|
   | Description: | Selects the error control setting           |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |     n=0      | Direct mode                                 |
   |--------------+---------------------------------------------|
   |     n=1      | Buffered mode                               |
   |--------------+---------------------------------------------|
   |     n=2      | Initiate V.42 without detection             |
   |--------------+---------------------------------------------|
   |     n=3      | Initiate V.42 with detection                |
   |--------------+---------------------------------------------|
   |     n=4      | Alternate protocol (MNP)                    |
   |--------------+---------------------------------------------|
   |     n=5      | Initiate with synchronous mode              |
   |--------------+---------------------------------------------|
   |     n=6      | Initiate with V.80 synchronous access mode  |
   |--------------+---------------------------------------------|
   |     m=0      | Error control optional; if error control is |
   |              | not established, maintain DTE-DCE data rate |
   |              | to match line rate and use buffered mode    |
   |              | with flow control.                          |
   |--------------+---------------------------------------------|
   |     m=1      | Error control optional; if error control is |
   |              | not established, change DTE-DCE data rate   |
   |              | to match line rate and use direct mode      |
   |--------------+---------------------------------------------|
   |     m=2      | Error control required; if no LAPM,         |
   |              | disconnect                                  |
   |--------------+---------------------------------------------|
   |     m=3      | MNP required; if no MNP, disconnect         |
   |--------------+---------------------------------------------|
   |     o=0      | Direct mode                                 |
   |--------------+---------------------------------------------|
   |     o=1      | EC disabled, buffered mode                  |
   |--------------+---------------------------------------------|
   |     o=3      | EC optional; if no EC, use direct mode      |
   |--------------+---------------------------------------------|
   |     o=4      | Error control required; if no EC,           |
   |              | disconnect                                  |
   |--------------+---------------------------------------------|
   |     o=5      | Error control optional; if no EC,           |
   |              | disconnect                                  |
   |--------------+---------------------------------------------|
   |     o=6      | MNP error control required, if no MNP,      |
   |              | disconnect                                  |
   |--------------+---------------------------------------------|
   |     o=7      | Synchronous mode                            |
   |--------------+---------------------------------------------|
   |     o=8      | V.80 synchronous access mode.               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        INPUT BUFFER                        |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] Cn [cmds]                         |
   |--------------+---------------------------------------------|
   | Description: | Controls the input buffer size.             |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |     n=0      | 10 - 759 bytes                              |
   |--------------+---------------------------------------------|
   |     o=0      | 11 - 760 bytes                              |
   |--------------+---------------------------------------------|
   |     p=0      | Disables transmit level reporting           |
   |--------------+---------------------------------------------|
   |     q=0      | Sets the lowest carrier rate that may be    |
   |              | used                                        |
   |--------------+---------------------------------------------|
   |     r=0      | Sets the maximum carrier rate that may be   |
   |              | used                                        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      MANUFACTURER ID                       |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] +GMI [cmds]                       |
   |--------------+---------------------------------------------|
   | Description: | Displays the manufacturer ID                |
   +------------------------------------------------------------+

    

    

   +------------------------------------------------------------+
   |                          MODEL ID                          |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] +GMM [cmds]                       |
   |--------------+---------------------------------------------|
   | Description: | Displays the model ID                       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 REQUEST CAPABILITIES LIST                  |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] +GCAP [cmds]                      |
   |--------------+---------------------------------------------|
   | Description: | Displays one or more lines of information   |
   |              | reporting the V.25ter commands available in |
   |              | the modem                                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                          ROM CODE                          |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] +GMRn, o, p, q, r [cmds]          |
   |--------------+---------------------------------------------|
   | Description: | Display the ROM code                        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      SELECTIVE REPEAT                      |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] +ESRn [cmds]                      |
   |--------------+---------------------------------------------|
   | Description: | Control selective repeat                    |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |    +ESR0     | Do not use SREJ                             |
   |--------------+---------------------------------------------|
   |    +ESR1     | Use SREJ if available in remote DCE;        |
   |              | continue without it if not                  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  SYNCHRONOUS ACCESS MODE                   |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] +ESAn, m, o, p, q, r, s, t [cmds] |
   |--------------+---------------------------------------------|
   | Description: | Specifies the bit sequence transmitted by   |
   |              | the DCE when a transmit data buffer         |
   |              | underrun condition occures while operating  |
   |              | in transparent sub-mode                     |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |     n=0      | In transparent sub-mode, the DCE transmits  |
   |              | SYN1 on idle. DCE receiver does not seek    |
   |              | synchronization sequence                    |
   |--------------+---------------------------------------------|
   |     n=0      | In transparent sub-mode, the DCE transmits  |
   |              | SYN1 on idle. DCE receiver seeks SYN1 as a  |
   |              | synchronization sequence                    |
   |--------------+---------------------------------------------|
   |     m=0      | In framed sub-mode, the DCE transmits HDLC  |
   |              | flage on idle                               |
   |--------------+---------------------------------------------|
   |     m=0      | In framed sub-mode, the DCE transmits marks |
   |              | on idle                                     |
   |--------------+---------------------------------------------|
   |     o=0      | In framed sub-mode, DCE transmits HDLC      |
   |              | abort when underrun during a frame          |
   |--------------+---------------------------------------------|
   |     o=0      | In framed sub-mode, the DCE transmits HDLC  |
   |              | flag when underrun during a frame           |
   |--------------+---------------------------------------------|
   |     p=0      | Half duplex V.34 carriers are not           |
   |              | supported. Value must be 0                  |
   |--------------+---------------------------------------------|
   |     q=0      | CRC generation and checking disabled        |
   |--------------+---------------------------------------------|
   |              |                                             |
   |--------------+---------------------------------------------|
   |     r=0      | NRZI encoding and decoding disabled         |
   |--------------+---------------------------------------------|
   |     r=0      | NRZI encoding and decoding enabled          |
   |--------------+---------------------------------------------|
   |     s=0      | Specifies the 8-bit transparent sub-mode    |
   |              | synchronization sequence and idle           |
   |              | transmission value.                         |
   |--------------+---------------------------------------------|
   |     T=0      | Specifies the 16-bit synchronization        |
   |              | sequences are not supported.                |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  V.42bis DATA COMPRESSION                  |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] +DSn, m, o, p [cmds]              |
   |--------------+---------------------------------------------|
   | Description: | Controls the V.42bis data compression       |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |     n=0      | Disabled                                    |
   |--------------+---------------------------------------------|
   |     n=1      | Compression on transmit only                |
   |--------------+---------------------------------------------|
   |     n=2      | Compression on receive only                 |
   |--------------+---------------------------------------------|
   |     n=3      | Bi-directional compression                  |
   |--------------+---------------------------------------------|
   |     m=0      | Do not require V>42bis compression when     |
   |              | connecting                                  |
   |--------------+---------------------------------------------|
   |     o=0      | V.43bis dictionary size for bi-directional  |
   |              | compression                                 |
   |--------------+---------------------------------------------|
   |     o=1      | V.42bis maximum dictionary size for         |
   |              | bi-directional compression                  |
   |--------------+---------------------------------------------|
   |     p=0      | Maximum V.42bis string size                 |
   +------------------------------------------------------------+