Catalyst 6500 Series Switches Installation Guide - Ipland

Appendix B
Transceivers, Module Connectors, and Cable Specifications
Cables
Cables
Table B-25 lists the connector pinouts and signal names for a 10/100BASE-T crossover (MDI-X) cable.
Figure B-18 shows a schematic of the 10/100BASE-T crossover cable. Table B-26 lists the connector
pinouts and signal names for a 1000BASE-T crossover (MDI-X) cable. Figure B-19 shows a schematic
of the 1000BASE-T crossover cable.
Table B-25
10/100BASE-T Crossover Cable Pinout (MDI-X)
Side 1 Pin (Signal) Side 2 Pin (Signal)
1 (RD+) 3 (TD+)
2 (RD–) 6 (TD–)
3 (TD+) 1 (RD+)
6 (TD–) 2 (RD–)
4 (Not used) 4 (Not used)
5 (Not used) 5 (Not used)
7 (Not used) 7 (Not used)
8 (Not used) 8 (Not used)
Figure B-18
Switch
1 RD+
2 RD-
3 TD+
6 TD-
Twisted-Pair Crossover 10/100BASE-T Cable Schematic
Switch
1 RD+
2 RD-
3 TD+
6 TD-
4 NC
5 NC
7 NC
8 NC
4 NC
5 NC
7 NC
8 NC
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Catalyst 6500 Series Switches Installation Guide
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