B-6
Catalyst 3560 Switch Hardware Installation Guide
OL-6337-07
Appendix B Connector and Cable Specifications
Cable and Adapter Specifications
Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports
Figure B-8 and Figure B-9 show the schematics of four twisted-pair cables for 1000BASE-T SFP
module ports on Catalyst 3560 switches.
Figure B-8 Four Twisted-Pair Straight-Through Cable Schematic for 1000BASE-T Ports
Figure B-9 Four Twisted-Pair Crossover Cable Schematics for 1000BASE-T Ports
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 a different color from the wire connected to the pin on the inside of the right plug. (See Figure B-10.)
1 TP0+
2 TP0-
3 TP1+
6 TP1-
1 TP0+
2 TP0-
3 TP1+
6 TP1-
Switch Router or PC
4 TP2+
5 TP2-
7 TP3+
8 TP3-
4 TP2+
5 TP2-
7 TP3+
8 TP3-
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