Cisco Catalyst 2000 User Manual

268 Cisco LAN Switching Configuration Handbook
Asynchronous Serial Connections
An asynchronous serial connection, such as the Aux port or a line on an access server,
requires an RJ-45 connection. For a back-to-back link between two async ports on two dif-
ferent routers, you must use a rollover cable. Rollover cables are usually flat eight-conductor
cables with RJ-45 connectors, fashioned so that pin 1 on one end goes to pin 8 on the other
end, pin 2 goes to pin 7, and so forth. Cisco normally supplies a rollover cable with a console
cable kit. Table A-4 shows the pinout connections for both ends of the rollover cable.
Table A-4 RJ-45 Connector Pinouts for Rollover Cables
RJ-45 Pin
End A
Description
End A
Description
End B
RJ-45 Pin
End B
1RTSCTS8
2 DTR DSR 7
3 TxD RxD 6
4 GND GND 5
5 GND GND 4
6 RxD TxD 3
7 DSR DTR 2
8CTSRTS1

Cisco Catalyst 2000 Specifications

General

Brand	Cisco
Model	Catalyst 2000
Category	Switch
Language	English