32 [Documentation number: 2000430 Rev B]
Cable Adapters
8J RJ11 to Standard DB25 (Null-modem Configuration)
8J RJ11 to Standard DB25 (Null-modem Configuration)
The following table displays the modem wiring connection from a Comtrol 8J RJ11
to a standard DB25 connector.
Note:
If your DB25 wiring differs from the one shown below, adjust the DB25
pinouts accordingly.
8J RJ11 to Standard DB9 (Null-modem Configuration)
The following table displays the modem wiring connection from a Comtrol 8J RJ11
to a standard DB9 Connector.
Note:
If your DB9 wiring differs from the one shown below, adjust the DB9
pinouts accordingly.
8J RJ11 Connector Pinouts
a
a. RJ11 does not have all of the signals for RTS CTS (hardware handshaking). Use the cable for
XON/XOFF (software handshaking).
DB25 Connector Pinouts
Pin
RS-232 Signal
Pin
RS-232 Signal
1
NC
4
RxD
2
TxD
3
TxD
3
RxD
6
CTS
4
RTS
b
b. RTS and CTS may be jumpered together.
5
CTS
b
1
DTR
6
DSR
2
SigGnd
7
SigGnd
5
DCD
8
DCD
20
DTR
8J RJ11 Connector Pinouts
a
a. RJ11 does not have all of the signals for RTS CTS (hardware handshaking). Use the cable for XON/
XOFF (software handshaking).
DB9 Connector Pinouts
Pin
RS-232 Signal
Pin
RS-232 Signal
5
DCD
1
DCD
3
TxD
2
RxD
4
RxD
3
TxD
4
DTR
2
Signal GND
5
Signal GND
1
DTR
6
DSR
6
CTS
7
RTS
b
b. RTS and CTS may be jumpered together.
8
CTS
b
9
NC
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