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# 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
IMG IMG 1
+------------------------------------------------------------+
| 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 |
|-----------------------------------------+-------+----------|
| í Line speed set to 64Kbps | SW1/4 | Off |
|-----------------------------------------+-------+----------|
| Line speed set to 56Kbps | SW1/4 | On |
|-----------------------------------------+-------+----------|
| í 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% | | |
|-----------------------------------------+-------+----------|
| í DCD forced high | SW2/2 | On |
|-----------------------------------------+-------+----------|
| DCD follows RTS | SW2/2 | Off |
|-----------------------------------------+-------+----------|
| í Pin 18 of CN1 has no function | SW2/3 | Off |
|-----------------------------------------+-------+----------|
| Pin 18 of CN1 begins local analog | SW2/3 | On |
| loopback test | | |
|-----------------------------------------+-------+----------|
| í 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 |
|-------------------------+-----------+-----------+----------|
| í 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 |
|--------------------+-------------------+-------------------|
| í 10 bits | On | Off |
|--------------------+-------------------+-------------------|
| 11 bits | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT CONFIGURATION |
|------------------------------------------------------------|
| Setting | SW3 | SW4 | SW5 |
|---------------+--------------+--------------+--------------|
| í 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. |
+------------------------------------------------------------+