3Com CoreBuilder 7000 Installation & Start?Up Manual page 121

Table 33 Cable Pinouts to a Modem Interface
CoreBuilder 7000 Serial Port
9-pin Male
Screen
TxD
RxD
RTS
CTS
DSR
GND
RTS
DTR
To Modem Port
25-pin Male
Shell Shell
2 2
3 3
8 4
7 5
4 6
5 7
1 8
6 20
Ethernet Cabling 121
Screen
RxD
TxD
CTS
RTS
DTR
GND
DCD
DSR