CARDINAL TECHNOLOGIES,INC.
==========================

   MB2400EX

   Card Type                Modem (synchronous/asynchronous)      
   Chip Set                 Unidentified                          
   Maximum Data Rate        2400bps                               
   Data Bus                 External                              
   Data Modulation Protocol Bell 103/212A                         
                                                                  
                            ITU-T V.21, V.22, V.22bis             

<gopher://bitreich.org/I/th99/t/C-D/52284-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Function        | Label  |   Function    |   Label   |
   |------------------------------------------------------------|
   | Line in                   |   CN1    | DC power     | CN4  |
   |---------------------------+----------+--------------+------|
   | Line out                  |   CN2    | Power switch | SW1  |
   |---------------------------+----------+--------------+------|
   | RS-232/422                |   CN3    |              |      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   | LED | Color |  Status  |             Condition             |
   |-----+-------+----------+-----------------------------------|
   | HS  |  Red  |    On    | Modem is operating at 2400bps or  |
   |     |       |          |              faster               |
   |-----+-------+----------+-----------------------------------|
   | HS  |  Red  |   Off    | Modem is operating at slower than |
   |     |       |          |              2400bps              |
   |-----+-------+----------+-----------------------------------|
   | AA  |  Red  |    On    |        Auto-answer enabled        |
   |-----+-------+----------+-----------------------------------|
   | AA  |  Red  |   Off    |       Auto-answer disabled        |
   |-----+-------+----------+-----------------------------------|
   | AA  |  Red  | Blinking |         Phone is ringing          |
   |-----+-------+----------+-----------------------------------|
   | CD  |  Red  |    On    |      Carrier signal detected      |
   |-----+-------+----------+-----------------------------------|
   | CD  |  Red  |   Off    |    Carrier signal not detected    |
   |-----+-------+----------+-----------------------------------|
   | OH  |  Red  |    On    |         Modem is off-hook         |
   |-----+-------+----------+-----------------------------------|
   | OH  |  Red  |   Off    |         Modem is on-hook          |
   |-----+-------+----------+-----------------------------------|
   | RD  |  Red  |    On    |      Modem is receiving data      |
   |-----+-------+----------+-----------------------------------|
   | RD  |  Red  |   Off    |    Modem is not receiving data    |
   |-----+-------+----------+-----------------------------------|
   | SD  |  Red  |    On    |    Modem is transmitting data     |
   |-----+-------+----------+-----------------------------------|
   | SD  |  Red  |   Off    |  Modem is not transmitting data   |
   |-----+-------+----------+-----------------------------------|
   | TR  |  Red  |    On    |        DTR signal is high         |
   |-----+-------+----------+-----------------------------------|
   | TR  |  Red  |   Off    |         DTR signal is low         |
   |-----+-------+----------+-----------------------------------|
   | MR  |  Red  |    On    |            Power is on            |
   |-----+-------+----------+-----------------------------------|
   | MR  |  Red  |   Off    |           Power is off            |
   |-----+-------+----------+-----------------------------------|
   | MR  |  Red  | Blinking |        Modem in test mode         |
   +------------------------------------------------------------+

                     Proprietary AT Command Set

   +------------------------------------------------------------+
   |                    PULSE DIALING RATIO                     |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] &Pn [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Selects pulse dial make/break ratio         |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |    i &P0     | 39/61ms at 10pps (North America)            |
   |--------------+---------------------------------------------|
   |     &P1      | 34/66ms at 10pps (British)                  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     REPORT INFORMATION                     |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] In [cmds]                         |
   |--------------+---------------------------------------------|
   | Description: | Displays information requested              |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |      I0      | Reports modem code                          |
   |--------------+---------------------------------------------|
   |      I1      | Reports ROM checksum                        |
   |--------------+---------------------------------------------|
   |      I2      | Tests and reports ROM checksum              |
   |--------------+---------------------------------------------|
   |      I3      | Reports version information                 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   STORE TELEPHONE NUMBER                   |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] &Zn=(phone # & modifiers)         |
   |--------------+---------------------------------------------|
   | Description: | Writes selected telephone numbers into the  |
   |              | non-volatile memory at location n           |
   |--------------+---------------------------------------------|
   | Note:        | The characters described in the D command   |
   |              | are valid for use in the &Z command;        |
   |              | telephone numbers and modifiers can include |
   |              | up to 30 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   |   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 requested       |
   |      |       |                                             |
   |      |     1 | Remote digital loopback requested           |
   |------+-------+---------------------------------------------|
   |  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                                    |
   +------------------------------------------------------------+