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# RAD DATA COMMUNICATIONS
SRM-6DC
Modem Type Data (Asynchronous)
Maximum Data Rate 38.4Kbps
Data Bus External
Data Modulation Protocol Proprietary
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| RS-232/422 | CN1 | Ground | GND |
|------------------+----------+-------------------+----------|
| Receive positive | +RCV | Transmit positive | +XMT |
|------------------+----------+-------------------+----------|
| Receive negative | -RCV | Transmit negative | -XMT |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CD SIGNAL |
|------------------------------------------------------------|
| Setting | JP1 |
|----------------------------+-------------------------------|
| » Forced high | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| Normal | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ECHO |
|------------------------------------------------------------|
| Setting | JP3 |
|----------------------------+-------------------------------|
| » On | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| Off | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| IMPEDANCE |
|------------------------------------------------------------|
| Setting | JP4 |
|----------------------------+-------------------------------|
| » Low | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| High | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE CONNECTION |
|------------------------------------------------------------|
| Setting | JP2 |
|----------------------------+-------------------------------|
| » 4-wire | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 2-wire | Pins 1 & 2 closed |
+------------------------------------------------------------+