
Appendix B Connector and Cable Specifications
Cable and Adapter Specifications
Four Twisted-Pair  Cable Pinouts
Figure B-10 
Switch
1TPO+ 
2TPO- 
3TP1+ 
6TP1- 
4TP2+ 
5TP2- 
7TP3+ 
8TP3- 
Figure B-11 
Switch
1 TP0+
2 TP0-
3 TP1+
6 TP1-
4 TP2+
5 TP2-
7 TP3+
8 TP3-
Four 
Router or PC
1 TP1+
2 TP1-
3 TPO+
6 TPO-
| 4 | TP3+ | 
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| 5 | TP3- | 
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| 7 | TP2+ | 65272 | |
| 8 | TP2- | ||
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Four 
| 
 | Switch | 
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| 1 | TP0+ | 
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| 2 | TP0- | 
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| 3 | TP1+ | 
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| 6 | TP1- | 
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| 4 | TP2+ | 
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| 5 | TP2- | 
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| 7 | TP3+ | 65274 | |
| 8 | TP3- | ||
| 
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Two Twisted-Pair  Cable Pinouts
Figure B-12 
Switch
3TD+
6 TD–
1RD+
2 RD–
Two Twisted-Pair  Straight-Through  Cable Schematic
Router or PC
 3 RD+
 3 RD+  6 RD–
 6 RD–
| 1 TD+ | H5578 | |
| 2 TD– | ||
| 
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Catalyst 
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