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Appendix B
Connector and Cable Specifications
Two Twisted-Pair Cable Pinouts
Figure B-6
Figure B-6
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Figure B-7
Switch
3 TD+
6 TD–
1 RD+
2 RD–
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-8
Pin 1
OL-12192-01
and
Figure B-7
show the schematics of two twisted-pair cables.
Two Twisted-Pair Straight-Through Cable Schematic
Router or PC
3 RD+
6 RD–
1 TD+
2 TD–
Two Twisted-Pair Crossover Cable Schematic
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Identifying a Crossover Cable
Pin 1 on one connector and
pin 8 on the other connector
should be the same color.
Catalyst Switch Module 3110G, 3110X, and 3012 for IBM BladeCenter Hardware Installation Guide
Cable and Adapter Specifications
Pin 8
Figure
B-8.)
B-5