
Appendix B Connectors and Cables
Cable and Adapter Specifications
Four Twisted-Pair  Cable Pinouts for 10/100 Ports
Figure B-8 and Figure B-9 show the schematics of four twisted-pair  cables for 10/100 ports.
Figure B-8  Four Twisted-Pair  Straight-Through  Cable Schematic for 10/100 Ports
| Switch | Router or PC | 
1TPO+ 
 1 TP1+
 1 TP1+
2TPO- 
 2 TP1-
 2 TP1-
3TP1+ 
 3 TPO+
 3 TPO+
6TP1- 
 6 TPO-
 6 TPO-
4TP2+ 
 4 TP3+
 4 TP3+
5TP2- 
 5 TP3-
 5 TP3-
7TP3+ 
 7 TP2+
 7 TP2+
8TP3- 
 8 TP2-
 8 TP2-
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Figure B-9  Four Twisted-Pair  Crossover Cable Schematic for 10/100 Ports
SwitchSwitch
| 1 | RD+ | 1 | RD+ | 
| 2 | RD- | 2 | RD- | 
| 3 | TD+ | 3 | TD+ | 
| 6 | TD- | 6 | TD- | 
| 4 | NC | 4 | NC | 
| 5 | NC | 5 | NC | 
| 7 | NC | 7 | NC | 
| 8 | NC | 8 | NC | 
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Catalyst 2940 Switch Hardware Installation Guide
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