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# MULTI-TECH SYSTEMS, INC.
MT56DSU2
Card Type DSU/CSU (synchronous/asynchronous)
Transfer Rates 56Kbps/19.2Kbps/9600bps/4800bps/2400bps
Data Bus External
Data Modulation DDS
Protocol
Topology Star/Peer-Peer
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|-----------------------+-------+--------------------+-------|
| RS-232 port | CN1 | V.35 port | CN4 |
|-----------------------+-------+--------------------+-------|
| DC power | CN2 | Power switch | SW1 |
|-----------------------+-------+--------------------+-------|
| RJ-48 line out | CN3 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|----------------------------------------+--------+----------|
| » | RTS forced high | SW2/6 | Off |
|---+------------------------------------+--------+----------|
| | RTS normal | SW2/6 | On |
|---+------------------------------------+--------+----------|
| » | DSR forced high | SW2/7 | Off |
|---+------------------------------------+--------+----------|
| | DSR normal | SW2/7 | On |
|---+------------------------------------+--------+----------|
| » | Synchronous mode | SW2/8 | On |
|---+------------------------------------+--------+----------|
| | Asynchronous mode | SW2/8 | Off |
|---+------------------------------------+--------+----------|
| » | Loopback test mode disabled | SW2/9 | On |
|---+------------------------------------+--------+----------|
| | Loopback test mode enabled | SW2/9 | Off |
|---+------------------------------------+--------+----------|
| » | Test pattern mode disabled | SW2/10 | On |
|---+------------------------------------+--------+----------|
| | Test pattern mode enabled | SW2/10 | Off |
|---+------------------------------------+--------+----------|
| » | Circuit assurance function | SW2/11 | On |
| | disabled | | |
|---+------------------------------------+--------+----------|
| | Circuit assurance function enabled | SW2/11 | Off |
|---+------------------------------------+--------+----------|
| » | System status function disabled | SW2/12 | On |
|---+------------------------------------+--------+----------|
| | System status function enabled | SW2/12 | Off |
|---+------------------------------------+--------+----------|
| » | Elastic store function disabled | SW3/3 | On |
|---+------------------------------------+--------+----------|
| | Elastic store function enabled | SW3/3 | Off |
|---+------------------------------------+--------+----------|
| » | Anti-streaming function disabled | SW3/4 | Off |
|---+------------------------------------+--------+----------|
| | Anti-streaming function enabled | SW3/4 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ASYNCHRONOUS MODE BIT LENGTH |
|------------------------------------------------------------|
| Setting | SW3/1 | SW3/2 |
|------------------------+-----------------+-----------------|
| | 9-bit | On | Off |
|----+-------------------+-----------------+-----------------|
| » | 10-bit | Off | On |
|----+-------------------+-----------------+-----------------|
| | 11-bit | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CLOCK SOURCE |
|------------------------------------------------------------|
| Setting | SW2/4 | SW2/5 |
|-------------------------+-----------------+----------------|
| | Internal | On | On |
|---+---------------------+-----------------+----------------|
| | External | Off | Off |
|---+---------------------+-----------------+----------------|
| » | From DDS network | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRANSMISSION RATE |
|------------------------------------------------------------|
| Setting | SW2/1 | SW2/2 | SW2/3 |
|-------------------+-------------+-------------+------------|
| | 2400bps | Off | Off | Off |
|---+---------------+-------------+-------------+------------|
| | 4800bps | Off | On | Off |
|---+---------------+-------------+-------------+------------|
| | 9600bps | Off | Off | On |
|---+---------------+-------------+-------------+------------|
| | 19.2Kbps | Off | On | On |
|---+---------------+-------------+-------------+------------|
| » | 56Kbps | On | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|------+-------+----------+----------------------------------|
| SD | Red | On | DSU is transmitting data |
|------+-------+----------+----------------------------------|
| SD | Red | Off | DSU is not transmitting data |
|------+-------+----------+----------------------------------|
| RD | Red | On | DSU is receiving data |
|------+-------+----------+----------------------------------|
| RD | Red | Off | DSU is not receiving data |
|------+-------+----------+----------------------------------|
| CD | Red | On | Carrier signal detected |
|------+-------+----------+----------------------------------|
| CD | Red | Off | Carrier signal not detected |
|------+-------+----------+----------------------------------|
| 56 | Red | On | DSU connected at 56Kbps |
|------+-------+----------+----------------------------------|
| 56 | Red | Off | DSU not connected at 56Kbps |
|------+-------+----------+----------------------------------|
| 19.2 | Red | On | DSU connected at 19.2Kbps |
|------+-------+----------+----------------------------------|
| 19.2 | Red | Off | DSU not connected at 19.2Kbps |
|------+-------+----------+----------------------------------|
| 96 | Red | On | DSU connected at 9600bps |
|------+-------+----------+----------------------------------|
| 96 | Red | Off | DSU not connected at 9600bps |
|------+-------+----------+----------------------------------|
| 48 | Red | On | DSU connected at 4800bps |
|------+-------+----------+----------------------------------|
| 48 | Red | Off | DSU not connected at 4800bps |
|------+-------+----------+----------------------------------|
| CTS | Red | On | CTS signal is high |
|------+-------+----------+----------------------------------|
| CTS | Red | Off | CTS signal is low |
|------+-------+----------+----------------------------------|
| RTS | Red | On | RTS signal is high |
|------+-------+----------+----------------------------------|
| RTS | Red | Off | RTS signal is low |
|------+-------+----------+----------------------------------|
| NS | Red | On | DDS signal not detected |
|------+-------+----------+----------------------------------|
| NS | Red | Off | DDS signal detected |
|------+-------+----------+----------------------------------|
| NS | Red | Blinking | Errors detected in test pattern |
|------+-------+----------+----------------------------------|
| OOS | Red | On | DDS network out-of-service |
| | | | condition detected |
|------+-------+----------+----------------------------------|
| OOS | Red | Off | DDS network out-of-service |
| | | | condition not detected |
|------+-------+----------+----------------------------------|
| TM | Red | On | DSU is in test mode |
|------+-------+----------+----------------------------------|
| TM | Red | Off | DSU is not in test mode |
+------------------------------------------------------------+