3Com 520 - Manual (Page 78)

B-8 T E C H N I C A L I N F O R M A T I O N
Manager Port Connecting Cable
The manager port cable terminates with a 9 pin
female connector at one end and a 9-pin
male/female D-type connector or 25-pin D-type
male/female connector. The pin-out tables below
show the pin outs for both variants.
3Com end
pin no.
(9-way male
connector)
Signal Name Pin
Links
Signal Name
Terminal
or Com
port end
pin number
(9-way
male/female
connector)
Shell Screen Screen Shell
3 TxD RxD 2
2 RxD TxD 3
5 Ground Ground 5
7 RTS
(not connected)
RTS
(not connected)
7
8 CTS DTR 4
6 DSR CTS 8
1 DCD DSR 6
4 DTR DCD 1
3Com end
pin no.
(9-way male
connector)
Signal Name Pin
Links
Signal Name
Terminal
or Com
port end
pin number
(25-way
male/female
connector)
Shell Screen Screen 1
3 TxD RxD 3
2 RxD TxD 2
5 Ground Ground 7
7 RTS
(not connected)
RTS
(not connected)
4
8 CTS DTR 20
6 DSR CTS 5
1 DCD DSR 6
4 DTR DCD 8
Rc.bk : RCAPPB.FRM Page 8 Thursday, July 10, 1997 9:53 AM