Cisco 3750G-12S Hardware Installation Guide - Page 116
Identifying a Crossover Cable, Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports, B-11
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Page 116 highlights
Cable and Adapter Specifications Appendix B Connector and Cable Specifications 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-11.) Figure B-11 Pin 1 Identifying a Crossover Cable Pin 1 on one connector and pin 1 on the other connector should be different colors. Pin 1 200915 Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports Figure B-12 and Figure B-13 show the schematics of four twisted-pair cables for 10/100/1000 ports on Catalyst 3750 switches. Figure B-12 Switch 1 TPO+ 2 TPO3 TP1+ 6 TP1- Four Twisted-Pair Straight-Through Cable Schematic for 10/100/1000 Ports Router or PC 1 TP1+ 2 TP13 TPO+ 6 TPO- 4 TP2+ 5 TP27 TP3+ 8 TP3- 4 TP3+ 5 TP37 TP2+ 8 TP2- 65272 Catalyst 3750 Switch Hardware Installation Guide B-8 OL-6336-10
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