3Com 9000 SX User Manual page 33

Figure 2-2 shows the pin-outs for a 9-pin to RS-232 25-pin null modem
cable.
Switch 9000
Cable connector: 9-pin female
Screen Shell
TxD 3
RxD 2
Ground 5
RTS 7
CTS 8
DSR 6
DCD
1
DTR 4
Figure 2-2 Null modem cable pin-outs
Figure 2-3 shows the pin-outs for a 9-pin to 9-pin PC-AT serial null
modem cable.
Switch 9000
Cable connector: 9-pin female
Screen Shell
DTR 4
TxD 3
RxD 2
CTS 8
Ground 5
DSR 6
RTS 7
DCD 1
Figure 2-3 PC-AT serial cable pin-outs
Connecting Equipment to the Console Port
PC/Terminal
Cable connector: 25-pin male/female
1 Screen
3
2
7 Ground
4
20
5
6
8
PC-AT Serial Port
Cable connector: 9-pin female
Shell Screen
1
2
3
4
5 Ground
6
7
8
2-5
RxD
TxD
RTS
DTR
CTS
DSR
DCD
DCD
RxD
TxD
DTR
DSR
RTS
CTS