Total Control MP/16, Operator'S Manual

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EIA RS-232 Pinouts A-4
Connecting the MP/16 to Another DCE
It is possible to connect the MP/16 to another DCE. DCE
equipment is intended for direct connection to DTEs (dumb
terminals). To connect the MP/16 to a DCE, you can use a null
modem adapter, or rewire the cable connector to provide the
proper signaling, as in the following table.
Table B-3. Signal Assignments for MP/16 to another DCE Device
MP/16 DCE Device
Pin Signal Signal
1 RI DTR
2 DCD no connection
3 DTR RI
4 SGND SGND
5 RX TX
6 TX RX
7 CTS RTS
8 RTS CTS
Minimum Requirements
Some equipment supports only a few of the EIA RS-232 signal
functions—for instance, your equipment may have a 4-wire RJ11
interface. The following table lists the minimum signaling
requirements for the modems in the MP to operate.
Table B-4. Minimum Signal Requirements
RJ45 Pin Signal
3 RI
4 SGND
5 RX
6 TX