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# PATTON ELECTRONICS COMPANY
2703-X.21
Card Type E1 Modem
Chip Set Unidentified
I/O Options AC power connector, 15-pin DTE connector,
BNC network connectors (2), RJ-45 network
connector
Maximum Data Rate 2.048Mbps
Data Bus External
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------------------------------------------------|
| Power connector | CN1 | RJ-45 120Ohm | CN4 |
| | | twisted pair | |
| | | connector | |
|------------------------+-------+-----------------+---------|
| X.21 DTE port (15pin | CN2 | BNC 75Ohm | CN5 |
| connector) | | coaxial | |
| | | connector | |
|------------------------+-------+-----------------+---------|
| BNC 75Ohm coaxial | CN3 | Power switch | SW3 |
| connector | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|---------------------------------------+-------+------------|
| í 75Ohm transmit shield to ground | LK1 | Closed |
|---------------------------------------+-------+------------|
| 120Ohm transmit shield to ground | LK1 | Open |
|---------------------------------------+-------+------------|
| í 75Ohm receive shield to ground | LK2 | Open |
| connection broken | | |
|---------------------------------------+-------+------------|
| 75Ohm receive shield to ground made | LK2 | Closed |
| | | (optional) |
|---------------------------------------+-------+------------|
| í Factory configured - do not alter | LK3 | Open |
|---------------------------------------+-------+------------|
| í 1200Ohm shield to ground broken | LK4 | Open |
|---------------------------------------+-------+------------|
| 120Ohm shield to ground made | LK4 | Closed |
| | | (optional) |
|---------------------------------------+-------+------------|
| í Auto-sense enabled | LK5 | Closed |
|---------------------------------------+-------+------------|
| Auto-sense disabled | LK5 | Open |
|---------------------------------------+-------+------------|
| í Device is master (clock generated | S1/1 | On |
| internally) | | |
|---------------------------------------+-------+------------|
| Device is slave. (clock recovered | S1/1 | Off |
| from network) | | |
|---------------------------------------+-------+------------|
| í Loopback activated by front panel | S1/4 | Off |
|---------------------------------------+-------+------------|
| Continual loopback mode enabled | S1/4 | On |
|---------------------------------------+-------+------------|
| í Data inversion disabled | S1/5 | Off |
|---------------------------------------+-------+------------|
| Data inversion enabled | S1/5 | On |
|---------------------------------------+-------+------------|
| í Factory configured - do not alter | S1/6 | Off |
|---------------------------------------+-------+------------|
| í Factory configured - do not alter | S1/7 | Off |
|---------------------------------------+-------+------------|
| í Factory configured - do not alter | S1/8 | Off |
|---------------------------------------+-------+------------|
| Loopback test activated | SW2 | On |
|---------------------------------------+-------+------------|
| Normal mode. Loopback test not | SW2 | Off |
| activated | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE IMPEDANCE |
|------------------------------------------------------------|
| Setting | LK6 | LK7 |
|---------------------------------+------------+-------------|
| 75Ohm operation | Closed | Closed |
|---------------------------------+------------+-------------|
| 120Ohm operation | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RATE ADAPTATION |
|------------------------------------------------------------|
| Setting | S1/2 | S1/3 |
|---------------------------------+------------+-------------|
| 256Kbps | On | On |
|---------------------------------+------------+-------------|
| 512Kbps | Off | On |
|---------------------------------+------------+-------------|
| 1.024Mbps | On | Off |
|---------------------------------+------------+-------------|
| í 2.048Mbps | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|------+-------+--------+------------------------------------|
| PWR | Red | On | Power is on |
|------+-------+--------+------------------------------------|
| PWR | Red | Off | Power is off |
|------+-------+--------+------------------------------------|
| NET | Green | On | Network connection is good |
|------+-------+--------+------------------------------------|
| NET | Green | Off | Network connection is broken |
|------+-------+--------+------------------------------------|
| MCL | Green | On | Device is configured as a master |
| | | | clock unit |
|------+-------+--------+------------------------------------|
| MCL | Green | Off | Device is configured as a slave |
| | | | unit |
|------+-------+--------+------------------------------------|
| LOOP | Green | On | Device is conducting a loopback |
| | | | test |
|------+-------+--------+------------------------------------|
| LOOP | Green | Off | Device is not conducting a |
| | | | loopback test |
+------------------------------------------------------------+