(TXT) View Source
       
       # D-LINK
       
          DM-144FCX
       
          Card Type              Fax, Modem (synchronous/asynchronous)   
          Chip Set               Unidentified                            
          Maximum Data Rate      14.4Kbps                                
          Maximum Fax Rate       14.4Kbps                                
          Data Bus               PCMCIA Type II                          
          Fax Class              Class I & II                            
          Data Modulation        Bell 103/212A                           
          Protocol                                                       
                                 ITU-T V.21, V.22, V.22bis, V.23, V.32,  
                                 V.32bis                                 
          Fax Modulation         ITU-T V.17, V.21CH2, V.27ter, V.29      
          Protocol               
          Error                  MNP5, V.42bis                           
          Correction/Compression 
       
                                                                   V1913
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                    ACCEPT RELIABLE MODE                    |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \U [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Accepts remote modem’s request for MNP link |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        AUTO-RETRAIN                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %En [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects auto-retrain mode                   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í %E0     | Auto-retrain disabled                       |
          |--------------+---------------------------------------------|
          |     %E1      | Auto-retrain enabled                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S14                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S14=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | Read-only                                   |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls echo, result codes, result code    |
          |              | display, dial mode, and answer/originate    |
          |              | mode.                                       |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | On-line echo disabled                       |
          |      |       |                                             |
          |      |     1 | On-line echo enabled                        |
          |------+-------+---------------------------------------------|
          |  1   |     0 | Command echo disabled                       |
          |      |       |                                             |
          |      |     1 | Command echo enabled                        |
          |------+-------+---------------------------------------------|
          |  2   |     0 | Result codes disabled                       |
          |      |       |                                             |
          |      |     1 | Result codes enabled                        |
          |------+-------+---------------------------------------------|
          |  3   |     0 | Display result codes in numeric format      |
          |      |       |                                             |
          |      |     1 | Display result codes in verbose format      |
          |------+-------+---------------------------------------------|
          |  4   |   N/A | Not used                                    |
          |------+-------+---------------------------------------------|
          |  5   |     0 | Tone dial enabled                           |
          |      |       |                                             |
          |      |     1 | Pulse dial enabled                          |
          |------+-------+---------------------------------------------|
          |  6   |     0 | Modem returns result codes normally         |
          |      |       |                                             |
          |      |     1 | Modem returns result codes during originate |
          |      |       | only                                        |
          |------+-------+---------------------------------------------|
          |  7   |     0 | Answer mode enabled                         |
          |      |       |                                             |
          |      |     1 | Originate mode enabled                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S21                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S21=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | Read-only                                   |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects jack type, CTS signal, low DTR      |
          |              | action, DCD signal, DSR signal, and the     |
          |              | long space disconnect function.             |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Selects RJ-11, RJ-41S, or RJ45S jack        |
          |      |       |                                             |
          |      |     1 | Selects RJ-12 or RJ-13 jack                 |
          |------+-------+---------------------------------------------|
          |  1   |     0 | User profile 0                              |
          |      |       |                                             |
          |      |     1 | User profile 1                              |
          |------+-------+---------------------------------------------|
          |  2   |     0 | CTS follows RTS                             |
          |      |       |                                             |
          |      |     1 | CTS forced high                             |
          |------+-------+---------------------------------------------|
          | 4, 3 |    00 | DTR signal ignored                          |
          |      |       |                                             |
          |      |    01 | Modem goes to command mode on low DTR       |
          |      |       |                                             |
          |      |    10 | Modem disconnects on low DTR. Auto-Answer   |
          |      |       | is disabled.                                |
          |      |    11 |                                             |
          |      |       | Modem is initialized on low DTR             |
          |------+-------+---------------------------------------------|
          |  5   |     0 | DCD forced high                             |
          |      |       |                                             |
          |      |     1 | DCD normal                                  |
          |------+-------+---------------------------------------------|
          |  6   |     0 | DSR forced high                             |
          |      |       |                                             |
          |      |     1 | DSR normal                                  |
          |------+-------+---------------------------------------------|
          |  7   |     0 | Long space disconnect function disabled     |
          |      |       |                                             |
          |      |     1 | Long space disconnect function enabled      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S22                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S22=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 118                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped.                                 |
          |--------------+---------------------------------------------|
          | Description: | Controls volume and speaker settings,       |
          |              | result codes, and make/break pulse ratio.   |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 1, 0 |    00 | Lowest volume setting                       |
          |      |       |                                             |
          |      |    01 | Low volume setting                          |
          |      |       |                                             |
          |      |    10 | Medium volume setting                       |
          |      |       |                                             |
          |      |    11 | Highest volume setting                      |
          |------+-------+---------------------------------------------|
          | 3, 2 |    00 | Speaker disabled                            |
          |      |       |                                             |
          |      |    01 | Speaker enabled until carrier signal        |
          |      |       | detected                                    |
          |      |    10 |                                             |
          |      |       | Speaker enabled                             |
          |      |    11 |                                             |
          |      |       | Speaker enabled following dialing, then     |
          |      |       | disabled after carrier signal detected.     |
          |------+-------+---------------------------------------------|
          | 6, 5 |   000 | Busy and dialtone detection disabled,       |
          |  ,4  |       | result codes 0-4 enabled.                   |
          |      |   100 |                                             |
          |      |       | Busy and dialtone detection disabled,       |
          |      |   101 | result codes 0-5, 9-19 enabled.             |
          |      |       |                                             |
          |      |   110 | Busy tone detection disabled, dialtone      |
          |      |       | detection enabled, result codes 0-6, 8-19   |
          |      |   111 | enabled.                                    |
          |      |       |                                             |
          |      |       | Busy tone detection enabled, dialtone       |
          |      |       | detection disabled, result codes 0-5, 7-19  |
          |      |       | enabled.                                    |
          |      |       |                                             |
          |      |       | Busy and dialtone detection enabled, result |
          |      |       | codes 0-19 enabled.                         |
          |------+-------+---------------------------------------------|
          |  7   |     0 | 39/61ms at 10pps (North America)            |
          |      |       |                                             |
          |      |     1 | 33/67ms at 10pps (Europe)                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S23                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S23=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 177                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0-191                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Grants/denies remote digital loopback,      |
          |              | controls DTE rate and parity, and sets      |
          |              | guard tone.                                 |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Remote digital loopback denied              |
          |      |       |                                             |
          |      |     1 | Remote digital loopback allowed             |
          |------+-------+---------------------------------------------|
          |  3,  |   000 | Sets serial port speed to 0-300bps          |
          | 2, 1 |       |                                             |
          |      |   001 | Sets serial port speed to 600bps            |
          |      |       |                                             |
          |      |   010 | Sets serial port speed to 1200bps           |
          |      |       |                                             |
          |      |   011 | Sets serial port speed to 2400bps           |
          |      |       |                                             |
          |      |   100 | Sets serial port speed to 4800bps           |
          |      |       |                                             |
          |      |   101 | Sets serial port speed to 9600bps           |
          |      |       |                                             |
          |      |   110 | Sets serial port speed to 19200bps          |
          |      |       |                                             |
          |      |   111 | Sets serial port speed to 38400bps          |
          |------+-------+---------------------------------------------|
          | 5,4  |    00 | Parity even                                 |
          |      |       |                                             |
          |      |    01 | Not used                                    |
          |      |       |                                             |
          |      |    10 | Parity odd                                  |
          |      |       |                                             |
          |      |    11 | No Parity                                   |
          |------+-------+---------------------------------------------|
          | 7, 6 |    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:     | Read-only                                   |
          |--------------+---------------------------------------------|
          | Range:       | 0-108                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects synchronous/asynchronous mode, line |
          |              | type, clock source, and ITU-T/Bell modes.   |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  3,  |   000 | Asynchronous mode, serial port speed        |
          | 1, 0 |       | follows connect speed.                      |
          |      |   001 |                                             |
          |      |       | Asynchronous command mode and synchronous   |
          |      |   010 | connect mode.                               |
          |      |       |                                             |
          |      |   011 | Asynchronous command mode and synchronous   |
          |      |       | connect mode, DTR dialing enabled.          |
          |      |   100 |                                             |
          |      |       | Asynchronous command mode on low DTR,       |
          |      |       | synchronous connect mode on high DTR.       |
          |      |       |                                             |
          |      |       | Hayes AutoSync™ mode - serial port locked   |
          |      |       | at 9600bps.                                 |
          |------+-------+---------------------------------------------|
          |  2   |     0 | Dial up line                                |
          |      |       |                                             |
          |      |     1 | Leased line                                 |
          |------+-------+---------------------------------------------|
          | 5, 4 |    00 | Internal DTE transmit clock source          |
          |      |       |                                             |
          |      |    01 | External DTE transmit clock source          |
          |      |       |                                             |
          |      |    10 | Slave DTE transmit clock source             |
          |------+-------+---------------------------------------------|
          |  6   |     0 | ITU-T mode                                  |
          |      |       |                                             |
          |      |     1 | Bell mode                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S40                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S40=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | Read-only                                   |
          |--------------+---------------------------------------------|
          | Range:       | 0-247                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls break handling and flow control;   |
          |              | selects connect mode and MNP block size.    |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 1, 0 |    00 | Normal mode enabled                         |
          |      |       |                                             |
          |      |    01 | Normal mode enabled                         |
          |      |       |                                             |
          |      |    10 | Reliable mode enabled                       |
          |      |       |                                             |
          |      |    11 | Auto-reliable mode enabled                  |
          |------+-------+---------------------------------------------|
          |  4,  |   000 | \K0                                         |
          | 3, 2 |       |                                             |
          |      |   001 | \K1                                         |
          |      |       |                                             |
          |      |   010 | \K2                                         |
          |      |       |                                             |
          |      |   011 | \K3                                         |
          |      |       |                                             |
          |      |   100 | \K4                                         |
          |      |       |                                             |
          |      |   101 | \K5                                         |
          |------+-------+---------------------------------------------|
          | 6, 5 |    00 | MNP block size is 64 characters             |
          |      |       |                                             |
          |      |    01 | MNP block size is 128 characters            |
          |      |       |                                             |
          |      |    10 | MNP block size is 192 characters            |
          |      |       |                                             |
          |      |    11 | MNP block size is 256 characters            |
          |------+-------+---------------------------------------------|
          |  7   |     0 | Flow control disabled                       |
          |      |       |                                             |
          |      |     1 | Flow control enabled                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S41                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S41=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | Read-only                                   |
          |--------------+---------------------------------------------|
          | Range:       | 0-7                                         |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects compression, auto-retrain, and MNP  |
          |              | mode.                                       |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Data compression disabled                   |
          |      |       |                                             |
          |      |     1 | Data compression enabled                    |
          |------+-------+---------------------------------------------|
          |  1   |     0 | Auto-retrain disabled                       |
          |      |       |                                             |
          |      |     1 | Auto-retrain enabled                        |
          |------+-------+---------------------------------------------|
          |  2   |     0 | Stream mode for MNP                         |
          |      |       |                                             |
          |      |     1 | Block mode for MNP                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         BREAK SEND                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 3                                           |
          |--------------+---------------------------------------------|
          | Range:       | 1-9                                         |
          |--------------+---------------------------------------------|
          | Unit:        | .1 second                                   |
          |--------------+---------------------------------------------|
          | Description: | Sends break to modem                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         BREAK TYPE                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Kn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Configures action of break signal           |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \K0      | Buffers cleared and break sent to DTE       |
          |--------------+---------------------------------------------|
          |     \K1      | Buffers cleared and break sent to DTE       |
          |--------------+---------------------------------------------|
          |     \K2      | Send break to DTE immediately               |
          |--------------+---------------------------------------------|
          |     \K3      | Send break to DTE immediately               |
          |--------------+---------------------------------------------|
          |     \K4      | Send break with transmitted data            |
          |--------------+---------------------------------------------|
          |    í \K5     | Send break with transmitted data            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        COMPRESSION                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects data compression                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %C0      | Data compression disabled                   |
          |--------------+---------------------------------------------|
          |    í %C1     | Data compression enabled                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CONNECT MODE                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Nn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets connect mode                           |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \N0      | Normal mode enabled                         |
          |--------------+---------------------------------------------|
          |     \N1      | Normal mode enabled                         |
          |--------------+---------------------------------------------|
          |     \N2      | Reliable mode enabled                       |
          |--------------+---------------------------------------------|
          |    í \N3     | Auto-reliable mode enabled                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        FLOW CONTROL                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Gn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects modem port flow control             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í \G0     | Flow control disabled                       |
          |--------------+---------------------------------------------|
          |     \G1      | Flow control enabled                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      INACTIVITY TIMER                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Tn [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-42                                        |
          |--------------+---------------------------------------------|
          | Unit:        | 1 minute                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of time that the modem does |
          |              | not receive information before it           |
          |              | disconnects.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |            MAXIMUM BLOCK SIZE FOR TRANSMISSION             |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \An [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets the maximum transmittable block size   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \A0      | MNP block size is 64 characters             |
          |--------------+---------------------------------------------|
          |     \A1      | MNP block size is 128 characters            |
          |--------------+---------------------------------------------|
          |    í \A2     | MNP block size is 192 characters            |
          |--------------+---------------------------------------------|
          |     \A3      | MNP block size is 256 characters            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   MNP STREAM/BLOCK MODE                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Ln [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the transfer mode for MNP           |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í \L0     | Stream mode for MNP enabled                 |
          |--------------+---------------------------------------------|
          |     \L1      | Block mode for MNP enabled                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 ORIGINATE IN RELIABLE MODE                 |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \O [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Force an MNP connection regardless of       |
          |              | answer or originate mode                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   SWITCH TO NORMAL MODE                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Z [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Switches to normal mode from reliable link  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  SWITCH TO RELIABLE MODE                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Y  [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Initiates reliable link                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  REPORT LINE SIGNAL LEVEL                  |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %L [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Returns received line signal level          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 REPORT LINE SIGNAL QUALITY                 |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Q [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Returns line signal quality                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  RESET V.42bis DICTIONARY                  |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %P [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Clears the V.42bis dictionary               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         TEST MODES                         |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S16=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-125                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls loopback tests, analog, digital,   |
          |              | remote digital, and self tests.             |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Local analog loopback not in progress       |
          |      |       |                                             |
          |      |     1 | Local analog loopback in progress           |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Local digital loopback not in progress      |
          |      |       |                                             |
          |      |     1 | Local digital loopback in progress          |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | Modem not in remote digital loopback        |
          |      |       |                                             |
          |      |     1 | Remote digital loopback in progress         |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Remote digital loopback not requested       |
          |      |       |                                             |
          |      |     1 | Remote digital loopback requested           |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | Remote digital loopback w/ self-test not in |
          |      |       | progress                                    |
          |      |     1 |                                             |
          |      |       | Remote digital loopback w/ self-test in     |
          |      |       | progress                                    |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Local analog loopback w/ self-test not in   |
          |      |       | progress                                    |
          |      |     1 |                                             |
          |      |       | Local analog loopback w/ self-test in       |
          |      |       | progress                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       TRANSMIT LEVEL                       |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S91=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0-15                                        |
          |--------------+---------------------------------------------|
          | Unit:        | -1dBm                                       |
          |--------------+---------------------------------------------|
          | Description: | Controls transmit level                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                V.42bis COMPRESSION CONTROL                 |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Mn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls V.42bis data compression           |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %M0      | V.42bis disabled                            |
          |--------------+---------------------------------------------|
          |     %M1      | V.42bis when transmitting enabled           |
          |--------------+---------------------------------------------|
          |     %M2      | V.42bis when receiving enabled              |
          |--------------+---------------------------------------------|
          |    í %M3     | V.42bis when transmitting/receiving enabled |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  V.42bis DICTIONARY SIZE                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Dn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects V.42bis dictionary size             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      0       | 512 bytes                                   |
          |--------------+---------------------------------------------|
          |      1       | 1024 bytes                                  |
          |--------------+---------------------------------------------|
          |     í 2      | 2048 bytes                                  |
          |--------------+---------------------------------------------|
          |      3       | 4096 bytes                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               V.42bis MAXIMUM STRING LENGTH                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Sn [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 32                                          |
          |--------------+---------------------------------------------|
          | Range:       | 6-250                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Characters                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects string size for V.42bis compression |