Cisco Systems OL-6157-01 manual Cable and Adapter Specifications, Two Twisted-Pair Cable Pinouts

Appendix B Connectors and Cables

Cable and Adapter Specifications

Console Port

The console port uses an 8-pin RJ-45 connector. You can connect a switch to a PC through the console port and the supplied RJ-45-to-DB-9 adapter cable. If you want to connect a switch to a terminal, you need to provide an RJ-45-to-DB-25 female DTE adapter. You can order a kit (part number ACS-DSBUASYN=) with that adapter from Cisco. For console-port and adapter-pinout information, see Table B-2and Table B-3.

Cable and Adapter Specifications

These sections describe the cables and adapters used with Catalyst 2940 switches.

•Two Twisted-Pair Cable Pinouts, page B-5

•Four Twisted-Pair Cable Pinouts for 10/100 Ports, page B-6

•Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports, page B-7

•Cable and Adapter Pinouts, page B-8

Two Twisted-Pair Cable Pinouts

Figure B-6and Figure B-7show the schematics of two twisted-pair cables for 10/100 ports.

Figure B-6 Two Twisted-Pair Straight-Through Cable Schematic for 10/100 Ports

Switch

3TD+

6 TD–

1RD+

2 RD–

Router or PC

3 RD+ 6 RD–

1 TD+	H5578
2 TD–

Figure B-7 Two Twisted-Pair Crossover Cable Schematic for 10/100 Ports

Switch	Switch
3 TD+	3 TD+
6 TD–	6 TD–
1 RD+	1 RD+
2 RD–	2 RD–

H5579

Catalyst 2940 Switch Hardware Installation Guide

OL-6157-01 B-5