Cisco Systems 3550 manual Rollover Cable and Adapter Pinouts, Identifying a Rollover Cable

Appendix B Connector and Cable Specifications

Cable and Adapter Specifications

Rollover Cable and Adapter Pinouts

This section describes how to identify a rollover cable (used to connect to the console port) and also describes the adapter pinouts.

Identifying a Rollover Cable

To identify a rollover cable, compare the two modular ends of the cable. Hold the cable ends side-by-side, with the tab at the back. The wire connected to the pin on the outside of the left plug should be the same color as the wire connected to the pin on the outside of the right plug. (See Figure B-10.)

Figure B-10 Identifying a Rollover Cable

Pin 1 on one connector and pin 8 on the other connector should be the same color.

Pin 1 Pin 8

H10632

Adapter Pinouts

Table B-2lists the pinouts for the console port, the RJ-45-to-DB-9 adapter cable, and the console device.

Table B-2 Console Port Signaling Using a DB-9 Adapter

Switch Console	RJ-45-to-DB-9	Console
Port (DTE)	Terminal Adapter	Device
Signal	DB-9 Pin	Signal
RTS	8	CTS
DTR	6	DSR
TxD	2	RxD
GND	5	GND
GND	5	GND
RxD	3	TxD
DSR	4	DTR
CTS	7	RTS

Catalyst 3550 Multilayer Switch Hardware Installation Guide

OL-6155-01 B-5