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Connecting Equipment to the Console Port
29
Figure 5 shows the pin-outs for a 9-pin to RS-232 25-pin null modem
cable.
Figure 5
Null modem cable pin-outs
GND (ground) 5 -
DSR (data set ready) 6 In
RTS (request to send) 7 Out
CTS (clear to send 8 In
Table 6
Console Connector Pinouts (continued)
Function Pin Number Direction
Screen
TxD
RxD
Ground
RTS
CTS
DSR
DCD
DTR
Cable connector: 9-pin female
Switch 9100
Cable connector: 25-pin male/female
PC/Terminal
Screen
RxD
TxD
Ground
RTS
DTR
CTS
DSR
DCD
Shell
3
2
5
7
8
6
1
4
1
3
2
7
4
20
5
6
8
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