Rj11 Straight-Through Cable (Rs-232 Or Rs-485 Half-Duplex); Rj11 Loopback Plugs - Comtrol RocketPort INFINITY User Manual

Connecting Serial Devices
RJ11 Straight-
Through Cable (RS-
232 or RS-485 Half-
Duplex)
RJ11 Loopback
Plugs
20 - Connecting Serial Devices
Use straight-through cables to connect modems and DTE devices. For example,
you can connect one end of a straight-through cable to COM2 on one computer and
the other end of the straight-through cable to a modem.
RocketPort
Signal
RS-232 RS-485HD
DCD
RxD
TxD TRxD-
DTR TRxD+
GND
CTS
RocketPort INFINITY models with RJ11 connectors are shipped with
a a single loopback plug (RS-232/422).
Wire the following pins together to build additional loopback plugs or
replace a missing RS-232/422 loopback plug:
• Pins 3 to 4
• Pins 1 to 6
DCE Serial Device
DB9 DB25
RJ11
Pins Pins
Pins
8
5
1
3
4
2
2
3
3
20
4
1
7
2
5
5
6
8
RocketPort INFINITY User Guide: 2000465 Rev. G
Signal
RS-232 RS-485HD
DCD
RxD
TxD TRxD-
DTR TRxD+
GND
CTS