Cable Pin-Outs - 3Com 3C16630A User Manual

Cable Pin-Outs

This section shows the pin-outs for the Management Terminal cable
used to connect a terminal, PC or modem to the serial port (RS-232C
management port).
Null Modem Cable
RS-232C 25 pin to RS-232C 25 pin.
RS232C Serial Port
25 pin male
Screen
TxD
RxD
Ground
RTS
CTS
DSR
DCD
DTR
DUA1663-0BAA03
1
2
3
7
4
n/c n/c
5
6
8
20
Screen
1
only required if screen
3 RxD
2 TxD
always required
7 Ground
4 RTS
20 DTR
5 CTS
required for
handshaking
6 DSR
8 DCD
Cable Pin-Outs A-3