UNIDENTIFIED
============

   2400BPS MODEM (0302AMC)

   Card Type                    Modem (asynchronous)              
   Chip Set                     Unidentified                      
   Maximum Data Rate            2400bps                           
   Data Bus                     8-bit ISA                         
   Data Modulation Protocol     Bell 103A/212A                    
                                                                  
                                ITU-T V.22, V.22bis               
   Error Correction/Compression MNP5, V.42, V.42bis               

<gopher://bitreich.org/I/th99/t/U-Z/51881-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |        Function        |  Label   |   Function   |  Label  |
   |------------------------------------------------------------|
   | Line out                    |    CN1     | Line in  | CN2  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    SERIAL PORT ADDRESS                     |
   |------------------------------------------------------------|
   |   Setting   |   JP1/A   |   JP1/B   |   JP1/C   |  JP1/D   |
   |-------------+-----------+-----------+-----------+----------|
   | COM1 (3F8h) |  Closed   |   Open    |  Closed   |   Open   |
   |-------------+-----------+-----------+-----------+----------|
   | COM2 (2F8h) |  Closed   |   Open    |   Open    |  Closed  |
   |-------------+-----------+-----------+-----------+----------|
   | COM3 (3E8h) |   Open    |  Closed   |  Closed   |   Open   |
   |-------------+-----------+-----------+-----------+----------|
   | COM4 (2E8h) |   Open    |  Closed   |   Open    |  Closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         INTERRUPT                          |
   |------------------------------------------------------------|
   |  Setting   |   JP1/E   |   JP1/F   |   JP1/G   |   JP1/H   |
   |------------+-----------+-----------+-----------+-----------|
   |     2      |   Open    |   Open    |   Open    |  Closed   |
   |------------+-----------+-----------+-----------+-----------|
   |     3      |   Open    |  Closed   |   Open    |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |     4      |  Closed   |   Open    |   Open    |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |     5      |   Open    |   Open    |  Closed   |   Open    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         WAIT STATE                         |
   |------------------------------------------------------------|
   |      Setting       |       JP1/I       |       JP1/J       |
   |--------------------+-------------------+-------------------|
   |         0          |      Closed       |       Open        |
   |--------------------+-------------------+-------------------|
   |         1          |       Open        |      Closed       |
   +------------------------------------------------------------+

                     Proprietary AT Command Set

   +------------------------------------------------------------+
   |                    BIT MAPPED REGISTERS                    |
   |------------------------------------------------------------|
   |           Register           |           Default           |
   |------------------------------+-----------------------------|
   |             S14              |             170             |
   |------------------------------+-----------------------------|
   |             S21              |              0              |
   |------------------------------+-----------------------------|
   |             S22              |             118             |
   |------------------------------+-----------------------------|
   |             S23              |              7              |
   |------------------------------+-----------------------------|
   |             S27              |             64              |
   |------------------------------+-----------------------------|
   |             S28              |              0              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      DTMF ATTENUATION                      |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] %Dn [cmds]                        |
   |--------------+---------------------------------------------|
   | Default:     | 0                                           |
   |--------------+---------------------------------------------|
   | Range:       | 1-7                                         |
   |--------------+---------------------------------------------|
   | Unit:        | 2 dBm                                       |
   |--------------+---------------------------------------------|
   | Description: | Controls DTMF attenuation                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     SECONDARY DEFAULTS                     |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] %J [cmds]                         |
   |--------------+---------------------------------------------|
   | Description: | Sets all S registers and AT commands to     |
   |              | AT&F default except; S6=3s, range 3-255;    |
   |              | S11=95ms, range 60-255; %L3, 6dBm; %D1,     |
   |              | 2dBm.                                       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         TEST MODES                         |
   |------------------------------------------------------------|
   | Format       | AT [cmds] S16=n [cmds]                      |
   |--------------+---------------------------------------------|
   | Default:     | 0                                           |
   |--------------+---------------------------------------------|
   | Range:       | 0-125                                       |
   |--------------+---------------------------------------------|
   | Unit:        | Bit-mapped                                  |
   |--------------+---------------------------------------------|
   | Description: | Controls loopback tests, analog, digital,   |
   |              | remote digital, and self tests.             |
   |--------------+---------------------------------------------|
   | Bit  | Value |                  Function                   |
   |------+-------+---------------------------------------------|
   |  0   |   i 0 | Local analog loopback not in progress       |
   |      |       |                                             |
   |      |     1 | Local analog loopback in progress           |
   |------+-------+---------------------------------------------|
   |  1   |   i 0 | Not used                                    |
   |------+-------+---------------------------------------------|
   |  2   |   i 0 | Local digital loopback not in progress      |
   |      |       |                                             |
   |      |     1 | Local digital loopback in progress          |
   |------+-------+---------------------------------------------|
   |  3   |   i 0 | Modem not in remote digital loopback        |
   |      |       |                                             |
   |      |     1 | Remote digital loopback in progress         |
   |------+-------+---------------------------------------------|
   |  4   |   i 0 | Remote digital loopback not in progress     |
   |      |       |                                             |
   |      |     1 | Remote digital loopback in progress         |
   |------+-------+---------------------------------------------|
   |  5   |   i 0 | Remote digital loopback w/ self-test not in |
   |      |       | progress                                    |
   |      |     1 |                                             |
   |      |       | Remote digital loopback w/ self-test in     |
   |      |       | progress                                    |
   |------+-------+---------------------------------------------|
   |  6   |   i 0 | Local analog loopback w/ self-test not in   |
   |      |       | progress                                    |
   |      |     1 |                                             |
   |      |       | Local analog loopback w/ self-test in       |
   |      |       | progress                                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    TRANSMIT ATTENUATION                    |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] %Ln [cmds]                        |
   |--------------+---------------------------------------------|
   | Default:     | 0                                           |
   |--------------+---------------------------------------------|
   | Range:       | 1-7                                         |
   |--------------+---------------------------------------------|
   | Unit:        | 2 dBm                                       |
   |--------------+---------------------------------------------|
   | Description: | Controls transmit attenuation               |
   +------------------------------------------------------------+