Appendix B Connectors and Cables
Cable and Adapter Specifications
Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports
Figure B-10 and Figure B-11 show 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-
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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- |
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Catalyst 2940 Switch Hardware Installation Guide
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