Appendix B Connectors and Cables

Cable and Adapter Specifications

Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports

Figure B-10and Figure B-11show the schematics of four twisted-pair cables for the 10/100/1000 port.

Figure B-10 Four Twisted-Pair Straight-Through Cable Schematic for 10/100/1000 and 1000BASE-T GBIC Module Ports

Switch

Router or PC

1TPO+ 1 TP1+

2TPO- 2 TP1-

3TP1+ 3 TPO+

6TP1- 6 TPO-

4TP2+ 4 TP3+

5TP2- 5 TP3-

7TP3+ 7 TP2+

8TP3- 8 TP2-

65272

Figure B-11 Four Twisted-Pair Crossover Cable Schematics for 10/100/1000 and 1000BASE-T GBIC Module Ports

SwitchSwitch

1

TPO+

1

TP0+

2

TPO-

2

TP0-

3

TP1+

3

TP1+

6

TP1-

6

TP1-

4

TP2+

4

TP2+

5

TP2-

5

TP2-

7

TP3+

7

TP3+

8

TP3-

8

TP3-

65274

Catalyst 2940 Switch Hardware Installation Guide

 

OL-6157-01

B-7

 

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Cisco Systems 2940 manual Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports, Tpo