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Modem Cable
If you want to connect to the manager port using a
modem, you will need a cable as shown in the table
below. This connects the manager port's 9 pin
D-type connector to a 25-pin serial port on a
modem.
Signal Name Pin
3Com end
pin no.
(9-way male
connector)
Shell
Screen
3
TxD
2
RxD
7
RTS
8
CTS
6
DSR
5
Ground
1
DCD
4
DTR
Terminal
or Com
port end
Signal Name
pin number
Links
(25-way
male/female
connector)
Screen
1
TxD
2
RxD
3
RTS
4
CTS
5
DSR
6
Ground
7
DCD
8
DTR
20
Interface Cable Characteristics
LAN Port Connecting Cable - 10BaseT
The 10BaseT port terminates with an RJ45 connector
which can be connected to the 10BaseT port on
another device. The table below shows the pin-outs
for a straight through cable.
3Com end
pin no.
Pin
Links
(RJ45)
Signal name
1
TxD+
2
TxD-
3
RxD+
4
not used
5
not used
6
RxD-
7
not used
8
not used
B-9
Client end
pin no.
(RJ45)
1
2
3
4
5
6
9
10
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