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

   CMN-C8H/V.24, CMN-C8H/V.35, CMN-C8H/X.21, CMN-C8H/530

   Card Type         Modem (synchronous/asynchronous)             
   Chipset           Unidentified                                 
   Data Rate         56Kbps/64Kbps                                
   Data Modulation   Unidentified                                 
   Data Bus          Serial                                       

<gopher://bitreich.org/I/th99/t/P-R/53556-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |      Function       | Label |       Function       | Label |
   |---------------------+-------+----------------------+-------|
   | V.24, V.35, X.21,   |  CN1  | Unidentified         |  CN3  |
   | or RS-530 serial    |       |                      |       |
   | port via DB-25      |       |                      |       |
   | connector           |       |                      |       |
   |---------------------+-------+----------------------+-------|
   | Telephone line out  |  CN2  | Loopback test switch |  SW6  |
   |------------------------------------------------------------|
   |      Note: Standard V.35 or X.21 connector is provided on  |
   |      an included adapter cable.                            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                 Setting                 | Label | Position |
   |-----------------------------------------+-------+----------|
   | i Line speed set to 64Kbps              | SW1/4 |   Off    |
   |-----------------------------------------+-------+----------|
   | Line speed set to 56Kbps                | SW1/4 |    On    |
   |-----------------------------------------+-------+----------|
   | i Stop bit shortening for asynchronous  | SW1/5 |   Off    |
   | mode set to 25%                         |       |          |
   |-----------------------------------------+-------+----------|
   | Stop bit shortening for asynchronous    | SW1/5 |    On    |
   | mode set to 12.5%                       |       |          |
   |-----------------------------------------+-------+----------|
   | i DCD forced high                       | SW2/2 |    On    |
   |-----------------------------------------+-------+----------|
   | DCD follows RTS                         | SW2/2 |   Off    |
   |-----------------------------------------+-------+----------|
   | i Pin 18 of CN1 has no function         | SW2/3 |   Off    |
   |-----------------------------------------+-------+----------|
   | Pin 18 of CN1 begins local analog       | SW2/3 |    On    |
   | loopback test                           |       |          |
   |-----------------------------------------+-------+----------|
   | i Pin 21 of CN1 has no function         | SW2/4 |   Off    |
   |-----------------------------------------+-------+----------|
   | Pin 21 of CN1 begins remote digital     | SW2/4 |    On    |
   | loopback test                           |       |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CLOCK SOURCE SELECTION                   |
   |------------------------------------------------------------|
   |         Setting         |   SW1/1   |   SW1/2   |  SW1/3   |
   |-------------------------+-----------+-----------+----------|
   | i Internal clock source |    Off    |    Off    |   Off    |
   |-------------------------+-----------+-----------+----------|
   |  External clock source  |    On     |    Off    |   Off    |
   |-------------------------+-----------+-----------+----------|
   |  Received clock source  |    Off    |    Off    |    On    |
   |-------------------------+-----------+-----------+----------|
   |    Asynchronous mode    |    Off    |    On     |   Off    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   DATA LENGTH SELECTION                    |
   |------------------------------------------------------------|
   |      Setting       |       SW1/6       |       SW2/1       |
   |--------------------+-------------------+-------------------|
   |       8 bits       |        Off        |        Off        |
   |--------------------+-------------------+-------------------|
   |       9 bits       |        Off        |        On         |
   |--------------------+-------------------+-------------------|
   |     i 10 bits      |        On         |        Off        |
   |--------------------+-------------------+-------------------|
   |      11 bits       |        On         |        On         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SERIAL PORT CONFIGURATION                  |
   |------------------------------------------------------------|
   |    Setting    |     SW3      |     SW4      |     SW5      |
   |---------------+--------------+--------------+--------------|
   |     i DCE     |      On      |      On      |      On      |
   |---------------+--------------+--------------+--------------|
   |      DTE      |     Off      |     Off      |     Off      |
   +------------------------------------------------------------+

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