Specifications

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Cisco 7100 Series VPN Router Installation and Configuration Guide

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Appendix C Cable Specifications

Console and Auxiliary Port Cables and Pinouts

Identifying a Rollover Cable

You can identify a rollover cable by comparing the two modular ends of the cable. Holding the cables

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 C-1.) If

your cable was purchased from Cisco Systems, pin 1 will be white on one connector, and pin 8 will be

white on the other connector (a rollover cable reverses pins 1 and 8, 2 and 7, 3 and 6, and 4 and 5).

Figure C-1 Identifying a Rollover Cable

Console Port Cables and Pinouts

Use the RJ-45-to-RJ-45 rollover cable and RJ-45-to-DB-9 female DTE adapter (labeled TERMINAL)

to connect the console port to a PC running terminal emulation software. Table C-1 lists the signals and

pinouts for the asynchronous serial console port, the RJ-45-to-RJ-45 rollover cable, and the

RJ-45-to-DB-9 female DTE adapter (labeled TERMINAL).

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Table C-1 Console Port Signaling and Cabling Using a DB-9 Adapter

Console Port (DTE) RJ-45-to-RJ-45 Rollover Cable

RJ-45-to-DB-9

Terminal Adapter Console Device

Signal RJ-45 Pin RJ-45 Pin DB-9 Pin Signal

RTS 1

1. Pin 1 is connected internally to pin 8.

88 CTS

DTR 2 7 6 DSR

TxD 3 6 2 RxD

GND 4 5 5 GND

GND 5 4 5 GND

RxD 6 3 3 TxD

DSR 7 2 4 DTR

CTS 8

17 RTS