Installation guide

Appendix B Connector and Cable Specifications
Cable and Adapter Specifications
B-4
Catalyst 3550 Multilayer Switch Hardware Installation Guide
78-11358-06
Cable and Adapter Specifications
These sections describe the cables and adapters used with the Catalyst 3550
switches.
Two Twisted-Pair Cable Pinouts
Figure B-4 and Figure B-5 show the schematics of two twisted-pair cables for
ports running 10 Mbps traffic.
Figure B-4 Two Twisted-Pair Straight-Through Cable Schematic
Figure B-5 Two Twisted-Pair Crossover Cable Schematic
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Router or PC
3 RD+
6 RD–
1 TD+
2 TD–
H5578
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Switch
3 TD+
6 TD–
1 RD+
2 RD–
H5579