3Com 9100 User Manual page 29

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