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

   CMN-C6SC

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

<gopher://bitreich.org/I/th99/t/P-R/53564-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |      Function       | Label |       Function       | Label |
   |---------------------+-------+----------------------+-------|
   | Serial data port    |  CN1  | Telephone line out   |  CN2  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Setting             | Label |     Position      |
   |--------------------------------+-------+-------------------|
   | i DCD forced high              |  JP1  | Pins 1 & 2 closed |
   |--------------------------------+-------+-------------------|
   | DCD follows RTS                |  JP1  | Pins 2 & 3 closed |
   |--------------------------------+-------+-------------------|
   | i RTS to CTS delay set to 8mS  |  JP2  | Pins 1 & 2 closed |
   |--------------------------------+-------+-------------------|
   | RTS to CTS delay set to 50mS   |  JP2  | Pins 2 & 3 closed |
   |--------------------------------+-------+-------------------|
   | i CN1 is DCE                   |  SW2  |        On         |
   |--------------------------------+-------+-------------------|
   | CN1 is DTE                     |  SW2  |        Off        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              TRANSMIT CLOCK SOURCE SELECTION               |
   |------------------------------------------------------------|
   |    Setting    |    JP3/A     |    JP3/B     |    JP3/C     |
   |---------------+--------------+--------------+--------------|
   |  i Internal   |    Closed    |     Open     |     Open     |
   |---------------+--------------+--------------+--------------|
   |   External    |     Open     |    Closed    |     Open     |
   |---------------+--------------+--------------+--------------|
   |   Received    |     Open     |     Open     |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    LINE SPEED SELECTION                    |
   |------------------------------------------------------------|
   |           Setting           |             SW2              |
   |-----------------------------+------------------------------|
   |           900bps            |          Position 9          |
   |-----------------------------+------------------------------|
   |           1200bps           |          Position 8          |
   |-----------------------------+------------------------------|
   |           1800bps           |          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   |
   +------------------------------------------------------------+

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