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A-6
Cisco ME 3400 Ethernet Access Switch Hardware Installation Guide
OL-7677-04
Appendix A Connector and Cable Specifications
Cable and Adapter Specifications
Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports
Figure A-6 and Figure A-7 show the schematics of four twisted-pair cables for 1000BASE-T SFP
module ports on Cisco ME switches.
Figure A-6 Four Twisted-Pair Straight-Through Cable Schematic for 1000BASE-T Ports
Figure A-7 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 A-8.)
1 RD+
2 RD-
3TD+
6TD-
1 TD+
Switch Router or PC
2 TD-
3 RD+
6 RD-
4NC
5NC
7NC
8NC
4NC
5NC
7NC
8NC
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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-
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