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

   CMN-C8

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

<gopher://bitreich.org/I/th99/t/P-R/53557-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |      Function       | Label |       Function       | Label |
   |---------------------+-------+----------------------+-------|
   | Serial data port    |  CN1  | Loopback test switch |  SW4  |
   |---------------------+-------+----------------------+-------|
   | Telephone line out  |  CN2  |                      |       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Setting                 | Label | Position  |
   |----------------------------------------+-------+-----------|
   | i Front panel switch may initiate      |  JP1  | Pins 1 &  |
   | remote loopback test                   |       | 2 closed  |
   |----------------------------------------+-------+-----------|
   | Front panel switch may not initiate    |  JP1  | Pins 3 &  |
   | remote loopback test                   |       | 4 closed  |
   |----------------------------------------+-------+-----------|
   | i Stop bit shortening for asynchronous | SW1/1 |    Off    |
   | mode set to 12.5%                      |       |           |
   |----------------------------------------+-------+-----------|
   | Stop bit shortening for asynchronous   | SW1/1 |    On     |
   | mode set to 25%                        |       |           |
   |----------------------------------------+-------+-----------|
   | i DCD forced high                      | SW1/4 |    On     |
   |----------------------------------------+-------+-----------|
   | DCD follows RTS                        | SW1/4 |    Off    |
   |----------------------------------------+-------+-----------|
   | i Pin 18 of CN1 has no function        | SW1/5 |    Off    |
   |----------------------------------------+-------+-----------|
   | Pin 18 of CN1 begins local analog      | SW1/5 |    On     |
   | loopback test                          |       |           |
   |----------------------------------------+-------+-----------|
   | i Pin 21 of CN1 has no function        | SW1/6 |    Off    |
   |----------------------------------------+-------+-----------|
   | Pin 21 of CN1 begins remote digital    | SW1/6 |    On     |
   | loopback test                          |       |           |
   |----------------------------------------+-------+-----------|
   | i CN1 is DCE                           |  SW3  |    Off    |
   |----------------------------------------+-------+-----------|
   | CN1 is DTE                             |  SW3  |    On     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              TRANSMIT CLOCK SOURCE SELECTION               |
   |------------------------------------------------------------|
   |      Setting      |  JP2/A   |  JP2/B  |  JP2/C  |  JP2/D  |
   |-------------------+----------+---------+---------+---------|
   |    i Internal     |  Closed  |  Open   |  Open   |  Open   |
   |-------------------+----------+---------+---------+---------|
   |     External      |   Open   | Closed  |  Open   |  Open   |
   |-------------------+----------+---------+---------+---------|
   |     Received      |   Open   |  Open   | Closed  |  Open   |
   |-------------------+----------+---------+---------+---------|
   | Asynchronous mode |   Open   |  Open   |  Open   | Closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 RTS TO CTS DELAY SELECTION                 |
   |------------------------------------------------------------|
   |    Setting    |    JP3/A     |    JP3/B     |    JP3/C     |
   |---------------+--------------+--------------+--------------|
   |     0 mS      |    Closed    |     Open     |     Open     |
   |---------------+--------------+--------------+--------------|
   |     8 mS      |     Open     |    Closed    |     Open     |
   |---------------+--------------+--------------+--------------|
   |     68 mS     |     Open     |     Open     |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   DATA LENGTH SELECTION                    |
   |------------------------------------------------------------|
   |      Setting       |       SW1/2       |       SW1/3       |
   |--------------------+-------------------+-------------------|
   |       8 bits       |        Off        |        Off        |
   |--------------------+-------------------+-------------------|
   |       9 bits       |        Off        |        On         |
   |--------------------+-------------------+-------------------|
   |     i 10 bits      |        On         |        Off        |
   |--------------------+-------------------+-------------------|
   |      11 bits       |        On         |        On         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    LINE SPEED SELECTION                    |
   |------------------------------------------------------------|
   |           Setting           |             SW2              |
   |-----------------------------+------------------------------|
   |           1200bps           |          Position 7          |
   |-----------------------------+------------------------------|
   |           2400bps           |          Position 6          |
   |-----------------------------+------------------------------|
   |           3600bps           |          Position 5          |
   |-----------------------------+------------------------------|
   |           4800bps           |          Position 4          |
   |-----------------------------+------------------------------|
   |           7200bps           |          Position 3          |
   |-----------------------------+------------------------------|
   |          i 9600bps          |          Position 2          |
   |-----------------------------+------------------------------|
   |          14.4Kbps           |          Position 1          |
   |-----------------------------+------------------------------|
   |          19.2Kbps           |          Position 0          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   |  LED  |  Color  | Status  |           Condition            |
   |-------+---------+---------+--------------------------------|
   |  PWR  |  Green  |   On    |          Power is on           |
   |-------+---------+---------+--------------------------------|
   |  PWR  |  Green  |   Off   |          Power is off          |
   |-------+---------+---------+--------------------------------|
   |  XMT  | Yellow  |   On    |   Modem is transmitting data   |
   |-------+---------+---------+--------------------------------|
   |  XMT  | Yellow  |   Off   | Modem is not transmitting data |
   |-------+---------+---------+--------------------------------|
   |  RCV  | Yellow  |   On    |    Modem is receiving data     |
   |-------+---------+---------+--------------------------------|
   |  RCV  | Yellow  |   Off   |  Modem is not receiving data   |
   |-------+---------+---------+--------------------------------|
   |  DCD  | Yellow  |   On    |    Carrier signal detected     |
   |-------+---------+---------+--------------------------------|
   |  DCD  | Yellow  |   Off   |  Carrier signal not detected   |
   |-------+---------+---------+--------------------------------|
   |  TST  |   Red   |   On    |     Modem is in test mode      |
   |-------+---------+---------+--------------------------------|
   |  TST  |   Red   |   Off   |   Modem is not in test mode    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                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 port.                                               |
   +------------------------------------------------------------+