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       # POWERCOM AMERICA, INC.
       
          2814 INTERNAL
       
          Card Type              Fax, Modem (asynchronous)               
          Chip Set               Unidentified                            
          Maximum Data Rate      28.8Kbps                                
          Maximum Fax Rate       14.4Kbps                                
          Data Bus               8-bit ISA                               
          Fax Class              Class I                                 
          Data Modulation        Bell 103/212A                           
          Protocol                                                       
                                 ITU-T V.21, V.22, V.22bis, V.23, V.32,  
                                 V.32bis, V.34                           
          Fax Modulation         ITU-T V.17, V.21CH2, V.27ter, V.29      
          Protocol               
          Error                  MNP5, V.42bis                           
          Correction/Compression 
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |        Function        |  Label   |   Function   |  Label  |
          |------------------------------------------------------------|
          | Line in                     |    CN1     | Line out | CN2  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    SERIAL PORT ADDRESS                     |
          |------------------------------------------------------------|
          |    Setting    |    JP1    |   JP2    |   JP3    |   JP4    |
          |---------------+-----------+----------+----------+----------|
          | í COM1 (3F8h) |  Closed   |  Closed  |   Open   |   Open   |
          |---------------+-----------+----------+----------+----------|
          |  COM2 (2F8h)  |  Closed   |   Open   |   Open   |  Closed  |
          |---------------+-----------+----------+----------+----------|
          |  COM3 (3E8h)  |   Open    |  Closed  |  Closed  |   Open   |
          |---------------+-----------+----------+----------+----------|
          |  COM4 (2E8h)  |   Open    |   Open   |  Closed  |  Closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         INTERRUPT                          |
          |------------------------------------------------------------|
          |  Setting   |    JP5    |    JP6    |    JP7    |    JP8    |
          |------------+-----------+-----------+-----------+-----------|
          |     2      |  Closed   |   Open    |   Open    |   Open    |
          |------------+-----------+-----------+-----------+-----------|
          |     3      |   Open    |  Closed   |   Open    |   Open    |
          |------------+-----------+-----------+-----------+-----------|
          |    í 4     |   Open    |   Open    |  Closed   |   Open    |
          |------------+-----------+-----------+-----------+-----------|
          |     5      |   Open    |   Open    |   Open    |  Closed   |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |              AUTO-RELIABLE FALLBACK CHARACTER              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %An [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 19                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character used as the              |
          |              | auto-reliable fallback character; %A0 will  |
          |              | disable this function.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          AUTO-RELIABLE 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.                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              AUTOMATIC POWER LEVEL ADJUSTMENT              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Pn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls automatic transmit power level     |
          |              | adjustment during leased-line mode          |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í %P0     | Automatic power level adjustment disabled   |
          |--------------+---------------------------------------------|
          |     %P1      | Automatic power level adjustment enabled    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S14                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S14=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 138                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls echo, result codes and display,    |
          |              | dial mode, smart mode, restore profile on   |
          |              | power-up, and answer/originate mode.        |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | V.42 extended result code disabled          |
          |      |       |                                             |
          |      |     1 | V.42 extended result code enabled           |
          |------+-------+---------------------------------------------|
          |  1   |     0 | Command echo disabled                       |
          |      |       |                                             |
          |      |   í 1 | Command echo enabled                        |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Result codes enabled                        |
          |      |       |                                             |
          |      |     1 | Result codes disabled                       |
          |------+-------+---------------------------------------------|
          |  3   |     0 | Display result codes in numeric format      |
          |      |       |                                             |
          |      |   í 1 | Display result codes in verbose format      |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | SMART mode                                  |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | Tone dial enabled                           |
          |      |       |                                             |
          |      |     1 | Pulse dial enabled                          |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Restore profile 0 on power-up               |
          |      |       |                                             |
          |      |     1 | Restore profile 1 on power-up               |
          |------+-------+---------------------------------------------|
          |  7   |     0 | Answer mode enabled                         |
          |      |       |                                             |
          |      |   í 1 | Originate mode enabled                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S21                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S21=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 48                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-254                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects line type, CTS/DCD/DSR signals, low |
          |              | DTR action, and the long space disconnect   |
          |              | function.                                   |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Switched line                               |
          |      |       |                                             |
          |      |     1 | Leased-line                                 |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Not used                                    |
          |------+-------+---------------------------------------------|
          | 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 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  7   |   í 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:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls speaker volume and controls, and   |
          |              | limits results codes.                       |
          |--------------+---------------------------------------------|
          | 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                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S23                   |
          |------------------------------------------------------------|
          | Format        | AT [cmds] S23=n [cmds]                     |
          |---------------+--------------------------------------------|
          | Default:      | Unidentified                               |
          |---------------+--------------------------------------------|
          | Range:        | 0-60                                       |
          |---------------+--------------------------------------------|
          | Unit:         | Bit-mapped                                 |
          |---------------+--------------------------------------------|
          | Description:  | Controls DTE rate and parity.              |
          |---------------+--------------------------------------------|
          |  Bit  | Value |                  Function                  |
          |-------+-------+--------------------------------------------|
          | 3 - 0 |  0000 | Sets serial port speed to 110bps           |
          |       |       |                                            |
          |       |  0001 | Sets serial port speed to 300bps           |
          |       |       |                                            |
          |       |  0010 | Sets serial port speed to 600bps           |
          |       |       |                                            |
          |       |  0011 | Sets serial port speed to 1200bps          |
          |       |       |                                            |
          |       |  0100 | Sets serial port speed to 2400bps          |
          |       |       |                                            |
          |       |  0101 | Sets serial port speed to 4800bps          |
          |       |       |                                            |
          |       |  0110 | Sets serial port speed to 9600bps          |
          |       |       |                                            |
          |       |  0111 | Sets serial port speed to 14400bps         |
          |       |       |                                            |
          |       |  1000 | Sets serial port speed to 19200bps         |
          |       |       |                                            |
          |       |  1001 | Sets serial port speed to 38400bps         |
          |       |       |                                            |
          |       |  1010 | Sets serial port speed to 56700bps         |
          |       |       |                                            |
          |       |  1011 | Sets serial port speed to 76800bps         |
          |       |       |                                            |
          |       |  1100 | Sets serial port speed to 115200bps        |
          |-------+-------+--------------------------------------------|
          | 5, 4  |  í 00 | Parity even                                |
          |       |       |                                            |
          |       |    01 | Space Parity                               |
          |       |       |                                            |
          |       |    10 | Parity odd                                 |
          |       |       |                                            |
          |       |    11 | Mark or No Parity                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S27                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S27=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 5                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-165                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects asynchronous/error correction mode, |
          |              | and ITU-T/Bell modes.                       |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 2 -  |   000 | Asynchronous mode                           |
          |  0   |       |                                             |
          |      | í 101 | Error correction mode                       |
          |------+-------+---------------------------------------------|
          | 5 -  |   í 0 | Not used                                    |
          |  3   |       |                                             |
          |------+-------+---------------------------------------------|
          | 6, 7 |  í 00 | ITU/T mode                                  |
          |      |       |                                             |
          |      |    01 | Bell mode                                   |
          |      |       |                                             |
          |      |    10 | ITU/T V.23 at 1200bps (not used on US       |
          |      |       | versions)                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S28                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S28=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0-27                                        |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls automatic power level adjustment   |
          |              | and line speed.                             |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Automatic power level adjustment disabled   |
          |      |       |                                             |
          |      |     1 | Automatic power level adjustment enabled    |
          |------+-------+---------------------------------------------|
          | 4 -  |  0000 | Set line speed to 300bps                    |
          |  1   |       |                                             |
          |      |  0001 | Set line speed to 1200bps                   |
          |      |       |                                             |
          |      |  0010 | Set line speed to 2400bps                   |
          |      |       |                                             |
          |      |  0011 | Set line speed to 4800bps                   |
          |      |       |                                             |
          |      |  0100 | Set line speed to 7200bps                   |
          |      |       |                                             |
          |      |  0101 | Set line speed to 9600bps                   |
          |      |       |                                             |
          |      |  0110 | Set line speed to 12Kbps                    |
          |      |       |                                             |
          |      |  0111 | Set line speed to 14.4Kbps                  |
          |      |       |                                             |
          |      |  1000 | Set line speed to 16.8Kbps                  |
          |      |       |                                             |
          |      |  1001 | Set line speed to 19.2Kbps                  |
          |      |       |                                             |
          |      |  1010 | Set line speed to 21.6Kbps                  |
          |      |       |                                             |
          |      |  1011 | Set line speed to 24Kbps                    |
          |      |       |                                             |
          |      |  1100 | Set line speed to 26.4Kbps                  |
          |      |       |                                             |
          |      |  1101 | Set line speed to 28.8Kbps                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S40                   |
          |------------------------------------------------------------|
          | Format:         | AT [cmds] S40=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Default:        | 3                                        |
          |-----------------+------------------------------------------|
          | Range:          | 0-3                                      |
          |-----------------+------------------------------------------|
          | Description:    | Sets the maximum transmittable block     |
          |                 | size                                     |
          |------------------------------------------------------------|
          |   Bit   |   Value   |               Function               |
          |------------------------------------------------------------|
          |    1, 0     |      00 | MNP block size is 64 characters    |
          |             |         |                                    |
          |             |      01 | MNP block size is 128 characters   |
          |             |         |                                    |
          |             |      10 | MNP block size is 192 characters   |
          |             |         |                                    |
          |             |    í 11 | MNP block size is 256 characters   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S41                   |
          |------------------------------------------------------------|
          | Format:         | AT [cmds] S41=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Default:        | 0                                        |
          |-----------------+------------------------------------------|
          | Range:          | 0-1                                      |
          |-----------------+------------------------------------------|
          | Description:    | Selects data compression                 |
          |------------------------------------------------------------|
          |   Bit   | Value  |                Function                 |
          |------------------------------------------------------------|
          |      0      | í 0 | Data compression disabled              |
          |             |     |                                        |
          |             |   1 | MNP5 enabled                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         BREAK SEND                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 3                                           |
          |--------------+---------------------------------------------|
          | Range:       | 1-9                                         |
          |--------------+---------------------------------------------|
          | Unit:        | .1 second                                   |
          |--------------+---------------------------------------------|
          | Description: | Sends break to modem                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        COMPRESSION                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects data compression                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í %C0     | Data compression disabled                   |
          |--------------+---------------------------------------------|
          |     %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                         |
          |--------------+---------------------------------------------|
          |    í \N1     | Direct mode enabled                         |
          |--------------+---------------------------------------------|
          |     \N2      | MNP reliable mode enabled                   |
          |--------------+---------------------------------------------|
          |     \N3      | Auto-reliable mode enabled                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      LOCK SERIAL PORT                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Jn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets operation of serial port speed         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \J0      | Serial speed locked                         |
          |--------------+---------------------------------------------|
          |    í \J1     | Serial speed follows connect speed          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   EXTENDED RESULT CODES                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Vn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects MNP extended result codes           |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í \V0     | MNP extended result codes disabled          |
          |--------------+---------------------------------------------|
          |     \V1      | MNP extended result codes 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      | XON/XOFF flow control enabled               |
          |--------------+---------------------------------------------|
          |    í \Q2     | CTS flow control by DCE enabled             |
          |--------------+---------------------------------------------|
          |     \Q3      | Bidirectional RTS/CTS flow control enabled  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      INACTIVITY TIMER                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Tn [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-90                                        |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of time that the modem does |
          |              | not receive information before it           |
          |              | disconnects.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      INACTIVITY TIMER                      |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S39=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-90                                        |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | 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            |
          |--------------+---------------------------------------------|
          |     \A2      | MNP block size is 192 characters            |
          |--------------+---------------------------------------------|
          |    í \A3     | MNP block size is 256 characters            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         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                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   XON/XOFF PASS-THROUGH                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Xn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects whether XON/XOFF signals are sent   |
          |              | to remote modem                             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \X0      | XON/XOFF signals trapped by local modem     |
          |--------------+---------------------------------------------|
          |    í \X1     | XON/XOFF passed through local modem         |
          +------------------------------------------------------------+