RAD DATA COMMUNICATIONS
=======================

  CMN-C6AC, CMN-C6ACU

  Card Type         Modem (asynchronous)
  Chipset           Unidentified
  Maximum Data Rate 19.2Kbps x 2
  Data Modulation   Unidentified
  Data Bus          Proprietary

<gopher://bitreich.org/I/th99/t/P-R/53563-1.png>


  +------------------------------------------------------------+
  |                        CONNECTIONS                         |
  |------------------------------------------------------------|
  |       Function       | Label |      Function       | Label |
  |----------------------+-------+---------------------+-------|
  | Telephone line 1 out |  CN1  | Telephone line 2    |  CN3  |
  |                      |       | out                 |       |
  |----------------------+-------+---------------------+-------|
  | Serial port data 1   |  CN2  | Serial data port 2  |  CN4  |
  +------------------------------------------------------------+

  +------------------------------------------------------------+
  |                 USER CONFIGURABLE SETTINGS                 |
  |------------------------------------------------------------|
  |            Setting             | Label |     Position      |
  |--------------------------------+-------+-------------------|
  | i DCD forced high on modem 1   |  JP1  | Pins 2 & 3 closed |
  |--------------------------------+-------+-------------------|
  | DCD follows DTR on modem 1     |  JP1  | Pins 1 & 2 closed |
  |--------------------------------+-------+-------------------|
  | i DCD forced high on modem 2   |  JP2  | Pins 2 & 3 closed |
  |--------------------------------+-------+-------------------|
  | DCD follows DTR on modem 2     |  JP2  | Pins 1 & 2 closed |
  |--------------------------------+-------+-------------------|
  | i CN2 is DCE                   |  SW1  |        Off        |
  |--------------------------------+-------+-------------------|
  | CN2 is DTE                     |  SW1  |        On         |
  |--------------------------------+-------+-------------------|
  | i CN4 is DCE                   |  SW2  |        Off        |
  |--------------------------------+-------+-------------------|
  | CN4 is DTE                     |  SW2  |        On         |
  +------------------------------------------------------------+

  +------------------------------------------------------------+
  |                     DIAGNOSTIC LED(S)                      |
  |------------------------------------------------------------|
  | LED  | Color  | Status |             Condition             |
  |------+--------+--------+-----------------------------------|
  | PWR  | Green  |   On   |            Power is on            |
  |------+--------+--------+-----------------------------------|
  | PWR  | Green  |  Off   |           Power is off            |
  |------+--------+--------+-----------------------------------|
  | XMT1 | Yellow |   On   |   Modem 1 is transmitting data    |
  |------+--------+--------+-----------------------------------|
  | XMT1 | Yellow |  Off   | Modem is 1 not transmitting data  |
  |------+--------+--------+-----------------------------------|
  | RCV1 | Yellow |   On   |     Modem 1 is receiving data     |
  |------+--------+--------+-----------------------------------|
  | RCV1 | Yellow |  Off   |   Modem 1 is not receiving data   |
  |------+--------+--------+-----------------------------------|
  | DCD1 | Yellow |   On   | Carrier signal detected on line 1 |
  |------+--------+--------+-----------------------------------|
  | DCD1 | Yellow |  Off   |  Carrier signal not detected on   |
  |      |        |        |              line 1               |
  |------+--------+--------+-----------------------------------|
  | XMT2 | Yellow |   On   |   Modem 2 is transmitting data    |
  |------+--------+--------+-----------------------------------|
  | XMT2 | Yellow |  Off   | Modem is 2 not transmitting data  |
  |------+--------+--------+-----------------------------------|
  | RCV2 | Yellow |   On   |     Modem 2 is receiving data     |
  |------+--------+--------+-----------------------------------|
  | RCV2 | Yellow |  Off   |   Modem 2 is not receiving data   |
  |------+--------+--------+-----------------------------------|
  | DCD1 | Yellow |   On   | Carrier signal detected on line 1 |
  |------+--------+--------+-----------------------------------|
  | DCD1 | Yellow |  Off   |  Carrier signal not detected on   |
  |      |        |        |              line 1               |
  +------------------------------------------------------------+

  +------------------------------------------------------------+
  |                MISCELLANEOUS TECHNICAL NOTE                |
  |------------------------------------------------------------|
  | This card is intended for use in the CMN-16 rack-mount     |
  | system. The bus is used only for supplying power for the   |
  | card. All other card functions are accessed through the    |
  | serial ports.                                              |
  +------------------------------------------------------------+

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