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CCM840/1640 Installer/User Guide
Appendix B: Device Cabling
Each CCM serial port has an RJ-45 connector for attaching a serial device. The
following table lists the pin assignments.
Port Pin Assignments
Pin #
RS-232 Signal
1
RTS
2
DSR
3
DCD
4
RxD
5
TxD
6
GND
7
DTR
8
CTS
NOTE: RI (Ring Indicate) is not supported
Figures B.1 through B.3 show the wiring diagrams for cables that connect from
CCM ports to terminals/printers, PCs and modems.
Figure B.1: Cable Pin Assignments for RJ-45 to Terminal/Printer
Direction
Description
Output
Request To Send
Input
Data Set Ready
Input
Data Carrier Detect
Input
Receive Data
Output
Transmit Data
(N/A)
Signal Ground
Output
Data Terminal Ready
Input
Clear to Send
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