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B-5
Catalyst 3560 Switch Hardware Installation Guide
OL-6337-03
Appendix B Connector and Cable Specifications
Cable and Adapter Specifications
Figure B-8 Four Twisted-Pair Crossover Cable Schematics for 1000BASE-T Ports
Crossover Cable and Adapter Pinouts
This section describes how to identify a crossover cable and also describes the adapter pinouts.
Identifying a Crossover Cable
To identify a crossover cable, compare the two modular ends of the cable. Hold the cable ends
side-by-side, with the tab at the back. The wire connected to the pin on the outside of the left plug should
be the same color as the wire connected to the pin on the outside of the right plug. (See Figure B-9.)
Figure B-9 Identifying a Crossover Cable
1 TPO+
2 TPO-
3 TP1+
6 TP1-
1TP0+
Switch Switch
2TP0-
3TP1+
6TP1-
4 TP2+
5 TP2-
7 TP3+
8 TP3-
4TP2+
5TP2-
7TP3+
8TP3-
65274
Pin 1
H10632
Pin 8
Pin 1 on one connector and
pin 8 on the other connector
should be the same color.