3Com 520, 510, 530 manual Modem Cable, LAN Port Connecting Cable 10BaseT

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.

			Terminal
			or Com
3Com end	Signal Name Pin	Signal Name	port end
	Links		pin number
pin no.
			(25-way
(9-way male			male/female
connector)			connector)
Shell	Screen	Screen	1
3	TxD	TxD	2
2	RxD	RxD	3
7	RTS	RTS	4
8	CTS	CTS	5
6	DSR	DSR	6
5	Ground	Ground	7
1	DCD	DCD	8
4	DTR	DTR	20

Interface Cable Characteristics B-9

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		Client end
Pin	pin no.		pin no.
			(RJ45)
Links (RJ45)		Signal name
	1	TxD+	1
	2	TxD-	2
	3	RxD+	3
	4	not used	4
	5	not used	5
	6	RxD-	6
	7	not used	9
	8	not used	10