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       # TDK ELECTRONICS CORPORATION
       
          DF1414 PCMCIA
       
          Card Type              Fax, Modem (asynchronous)               
          Chip Set               Unidentified                            
          Maximum Data Rate      14.4Kbps                                
          Maximum Fax Rate       14.4Kbps                                
          Data Bus               PCMCIA Type II                          
          Fax Class              Class I                                 
          Data Modulation        Bell 103J/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.42, V.42bis                     
          Correction/Compression 
       
                                                                   V1938
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                  ACCEPT MNP RELIABLE MODE                  |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \U [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Accept remote modem’s request for MNP       |
          |              | reliable mode                               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 AUTO-FALLBACK/FALL-FORWARD                 |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Gn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects auto-fallback/fall-forward          |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í %G0     | Auto-fallback/fall-forward disabled         |
          |--------------+---------------------------------------------|
          |     %G1      | Auto-fallback/fall-forward enabled          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              AUTO-RELIABLE FALLBACK CHARACTER              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %An [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 13                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character used as the              |
          |              | auto-reliable fallback character; %A0 will  |
          |              | disable this function.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          AUTO-RELIABLE TIME BUFFER CONFIGURATION           |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls the handling of incoming data      |
          |              | during auto-reliable time period            |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í \C0     | Data is discarded                           |
          |--------------+---------------------------------------------|
          |     \C1      | Data is buffered                            |
          |--------------+---------------------------------------------|
          |     \C2      | Data is discarded; modem returns to normal  |
          |              | mode on receiving auto-reliable fallback    |
          |              | character.                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        AUTO-RETRAIN                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %En [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls auto-retrain mode                  |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %E0      | Auto-retrain disabled                       |
          |--------------+---------------------------------------------|
          |    í %E1     | Auto-retrain enabled                        |
          |--------------+---------------------------------------------|
          |     %E2      | Modem set to hang up on poor line quality   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S14                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S14=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 170                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0-174                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls echo, result codes and display,    |
          |              | dial mode, and answer/originate mode.       |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  1   |     0 | Command echo disabled                       |
          |      |       |                                             |
          |      |   í 1 | Command echo enabled                        |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Result codes enabled                        |
          |      |       |                                             |
          |      |     1 | Result codes disabled                       |
          |------+-------+---------------------------------------------|
          |  3   |     0 | Display result codes in numeric format      |
          |      |       |                                             |
          |      |   í 1 | Display result codes in verbose format      |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  5   |     0 | Tone dial enabled                           |
          |      |       |                                             |
          |      |   í 1 | Pulse dial enabled                          |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  7   |     0 | Answer mode enabled                         |
          |      |       |                                             |
          |      |   í 1 | Originate mode enabled                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S21                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S21=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 48                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-252                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects CTS/DCD/DSR signals, low DTR        |
          |              | action, and the long space disconnect       |
          |              | function.                                   |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 1, 0 |   í 0 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | CTS follows RTS                             |
          |      |       |                                             |
          |      |     1 | CTS forced high                             |
          |------+-------+---------------------------------------------|
          | 4, 3 |    00 | DTR signal ignored                          |
          |      |       |                                             |
          |      |    01 | Modem goes to command mode on low DTR       |
          |      |       |                                             |
          |      |  í 10 | Modem disconnects on low DTR; Auto-Answer   |
          |      |       | is disabled.                                |
          |      |    11 |                                             |
          |      |       | Modem is initialized on low DTR             |
          |------+-------+---------------------------------------------|
          |  5   |     0 | DCD forced high                             |
          |      |       |                                             |
          |      |   í 1 | DCD normal                                  |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | DSR forced high                             |
          |      |       |                                             |
          |      |     1 | DSR normal                                  |
          |------+-------+---------------------------------------------|
          |  7   |     0 | Long space disconnect function disabled     |
          |      |       |                                             |
          |      |   í 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 speaker volume and controls,       |
          |              | limits results codes, and pulse dial        |
          |              | make/break ratio.                           |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 1, 0 |    00 | Low level volume                            |
          |      |       |                                             |
          |      |    01 | Low level volume                            |
          |      |       |                                             |
          |      |  í 10 | Medium level volume                         |
          |      |       |                                             |
          |      |    11 | High level volume                           |
          |------+-------+---------------------------------------------|
          | 3, 2 |    00 | Speaker off                                 |
          |      |       |                                             |
          |      |  í 01 | Speaker off on carrier                      |
          |      |       |                                             |
          |      |    10 | Speaker always on                           |
          |      |       |                                             |
          |      |    11 | Speaker on during handshake                 |
          |------+-------+---------------------------------------------|
          | 6 -  |   000 | Basic result codes only enabled             |
          |  4   |       |                                             |
          |      |   100 | Basic and connection speed result codes     |
          |      |       | enabled                                     |
          |      |   101 |                                             |
          |      |       | Basic and connection speed result codes and |
          |      |   110 | dialtone detection enabled                  |
          |      |       |                                             |
          |      | í 111 | All result codes except dialtone detection  |
          |      |       | enabled                                     |
          |      |       |                                             |
          |      |       | All result codes enabled                    |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | 39/61ms at 10pps (North America)            |
          |      |       |                                             |
          |      |     1 | 33/67ms at 10pps (Europe)                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S23                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S23=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 31                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-191                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Grants/denies remote digital loopback,      |
          |              | controls parity, and sets guard tone.       |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Remote digital loopback denied              |
          |      |       |                                             |
          |      |   í 1 | Remote digital loopback allowed             |
          |------+-------+---------------------------------------------|
          | 3 -  | í 111 | Not used                                    |
          |  1   |       |                                             |
          |------+-------+---------------------------------------------|
          | 5, 4 |    00 | Parity even                                 |
          |      |       |                                             |
          |      |  í 01 | Space Parity or No Parity                   |
          |      |       |                                             |
          |      |    10 | Parity odd                                  |
          |      |       |                                             |
          |      |    11 | Mark Parity                                 |
          |------+-------+---------------------------------------------|
          | 7, 6 |  í 00 | Guard tone disabled                         |
          |      |       |                                             |
          |      |    01 | Guard tone 550Hz enabled                    |
          |      |       |                                             |
          |      |    10 | Guard tone 1800Hz enabled                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S27                   |
          |------------------------------------------------------------|
          | Format         | AT [cmds] S27=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Default:       | 64                                        |
          |----------------+-------------------------------------------|
          | Range:         | 0-64                                      |
          |----------------+-------------------------------------------|
          | Unit:          | Bit-mapped                                |
          |----------------+-------------------------------------------|
          | Description:   | Selects ITU-T/Bell modes                  |
          |----------------+-------------------------------------------|
          |  Bit  | Value  |                 Function                  |
          |-------+--------+-------------------------------------------|
          | 5 - 0 | 000000 | Not used                                  |
          |-------+--------+-------------------------------------------|
          |   6   |    í 0 | ITU/T mode                                |
          |       |        |                                           |
          |       |      1 | Bell mode                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         BREAK SEND                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 3                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-9                                         |
          |--------------+---------------------------------------------|
          | Unit:        | .1 second                                   |
          |--------------+---------------------------------------------|
          | Description: | Sends break to modem                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         BREAK TYPE                         |
          |------------------------------------------------------------|
          | Type:               | Configuration                        |
          |---------------------+--------------------------------------|
          | Format:             | AT [cmds] \Kn [cmds]                 |
          |---------------------+--------------------------------------|
          | Description:        | Configures action of break signal    |
          |------------------------------------------------------------|
          |  Command  |  Break from  | Break from DTE | Break received |
          |           |     DTE      |                |  from remote   |
          |           |              | Reliable Mode  |     modem      |
          |           | Normal mode  |                |                |
          |-----------+--------------+----------------+----------------|
          |    \K0    | Online       | Online command | Buffers        |
          |           | command mode | mode enabled,  | cleared, break |
          |           | enabled,     | send no break  | sent to DTE    |
          |           | break sent   | to remote      |                |
          |           | to remote    | modem          |                |
          |           | modem        |                |                |
          |-----------+--------------+----------------+----------------|
          |    \K1    | Break sent   | Break sent to  | Buffers        |
          |           | to remote    | remote modem   | cleared, break |
          |           | modem        | and buffered   | sent to DTE    |
          |           |              | cleared        |                |
          |-----------+--------------+----------------+----------------|
          |    \K2    | Online       | Online command | Break sent     |
          |           | command mode | mode enabled,  | immediately to |
          |           | enabled,     | send no break  | DTE            |
          |           | break sent   | to remote      |                |
          |           | to remote    | modem          |                |
          |           | modem        |                |                |
          |-----------+--------------+----------------+----------------|
          |    \K3    | Break sent   | Send break to  | Break sent     |
          |           | to remote    | remote modem   | immediately to |
          |           | modem        | immediately    | DTE            |
          |-----------+--------------+----------------+----------------|
          |    \K4    | Online       | Online command | Break sent     |
          |           | command mode | mode enabled,  | with received  |
          |           | enabled,     | send no break  | data to the    |
          |           | break sent   | to remote      | DTE            |
          |           | to remote    | modem          |                |
          |           | modem        |                |                |
          |-----------+--------------+----------------+----------------|
          |   í \K5   | Break sent   | Send break     | Break sent     |
          |           | to remote    | with           | with received  |
          |           | modem        | transmitted    | data to the    |
          |           |              | data           | DTE            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        COMPRESSION                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects data compression                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %C0      | Data compression disabled                   |
          |--------------+---------------------------------------------|
          |    í %C1     | MNP5 enabled                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CONNECT MODE                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Nn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls the type of connection the modem   |
          |              | will operate in                             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \N0      | Normal mode enabled                         |
          |--------------+---------------------------------------------|
          |     \N1      | Direct mode enabled                         |
          |--------------+---------------------------------------------|
          |     \N2      | MNP reliable mode enabled                   |
          |--------------+---------------------------------------------|
          |    í \N3     | Auto-reliable mode enabled                  |
          |--------------+---------------------------------------------|
          |     \N4      | V.42 reliable mode enabled                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CONVERT TO MNP RELIABLE MODE                |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Y  [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Converts to MNP reliable mode from normal   |
          |              | or direct mode                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       DTE DATA SPEED                       |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S112=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sets the DTE data exchange rate allowed     |
          |              | during data mode                            |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í S112=0   | Last AT command speed                       |
          |--------------+---------------------------------------------|
          |    S112=2    | 300bps                                      |
          |--------------+---------------------------------------------|
          |    S112=3    | 1200bps                                     |
          |--------------+---------------------------------------------|
          |    S112=4    | 2400bps                                     |
          |--------------+---------------------------------------------|
          |    S112=5    | 4800bps                                     |
          |--------------+---------------------------------------------|
          |    S112=6    | 7200bps                                     |
          |--------------+---------------------------------------------|
          |    S112=7    | 9600bps                                     |
          |--------------+---------------------------------------------|
          |    S112=8    | 12Kbps                                      |
          |--------------+---------------------------------------------|
          |    S112=9    | 14.4Kbps                                    |
          |--------------+---------------------------------------------|
          |   S112=11    | 19.2Kbps                                    |
          |--------------+---------------------------------------------|
          |   S112=12    | 38.4Kbps                                    |
          |--------------+---------------------------------------------|
          |   S112=13    | 57.6Kbps                                    |
          |--------------+---------------------------------------------|
          |   S112=14    | 600bps                                      |
          |--------------+---------------------------------------------|
          |   S112=15    | 115.2Kbps                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   EXTENDED RESULT CODES                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Vn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects extended result codes               |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í \V0     | Extended result codes disabled              |
          |--------------+---------------------------------------------|
          |     \V1      | Extended result codes 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                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     FLOW CONTROL TYPE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Qn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets type of flow control used by modem     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \Q0      | Flow control disabled                       |
          |--------------+---------------------------------------------|
          |     \Q1      | Bidirectional XON/XOFF flow control enabled |
          |--------------+---------------------------------------------|
          |     \Q2      | CTS flow control by DCE enabled             |
          |--------------+---------------------------------------------|
          |    í \Q3     | Bidirectional RTS/CTS flow control enabled  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 INITIATE MNP RELIABLE MODE                 |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \O [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Initiates MNP reliable mode from normal or  |
          |              | direct mode                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      LOCK SERIAL PORT                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Jn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets operation of serial port speed         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í \J0     | Serial speed locked                         |
          |--------------+---------------------------------------------|
          |     \J1      | Serial speed follows connect speed          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |            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            |
          |--------------+---------------------------------------------|
          |     \A2      | MNP block size is 192 characters            |
          |--------------+---------------------------------------------|
          |    í \A3     | MNP block size is 256 characters            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   SWITCH TO NORMAL MODE                    |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Z [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Switches to normal mode from MNP mode       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         TEST MODES                         |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | 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                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   V.42 - DETECTION PHASE                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] -Jn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls V.42 detection                     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     -J0      | V.42 detection disabled                     |
          |--------------+---------------------------------------------|
          |    í -J1     | V.42 detection enabled                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               V.42bis - COMPRESSION CONTROL                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Hn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls V.42bis data compression           |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %H0      | V.42bis disabled                            |
          |--------------+---------------------------------------------|
          |     %H1      | V.42bis when transmitting enabled           |
          |--------------+---------------------------------------------|
          |     %H2      | V.42bis when receiving enabled              |
          |--------------+---------------------------------------------|
          |    í %H3     | V.42bis when transmitting/receiving enabled |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               V.42bis - COMPRESSION CONTROL                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] "Hn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls V.42bis data compression           |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     "H0      | V.42bis disabled                            |
          |--------------+---------------------------------------------|
          |     "H1      | V.42bis when transmitting enabled           |
          |--------------+---------------------------------------------|
          |     "H2      | V.42bis when receiving enabled              |
          |--------------+---------------------------------------------|
          |    í "H3     | V.42bis when transmitting/receiving enabled |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              V.42bis - MAXIMUM STRING LENGTH               |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] "On [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 16                                          |
          |--------------+---------------------------------------------|
          | Range:       | 6-250                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Characters                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects string size for V.42bis compression |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   XON/XOFF PASS-THROUGH                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Xn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects whether XON/XOFF signals are sent   |
          |              | to remote modem                             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í \X0     | XON/XOFF signals trapped by local modem     |
          |--------------+---------------------------------------------|
          |     \X1      | XON/XOFF passed through local modem         |