Cisco Catalyst 3550

Appendix B Connector and Cable Specifications
Cable and Adapter Specifications
B-8
Catalyst 3550 Multilayer Switch Hardware Installation Guide
78-11358-03
Figure B-9 Four Twisted-Pair Straight-Through Cable Schematic for
10/100 Ports
Figure B-10 Four Twisted-Pair Crossover Cable Schematic for 10/100 Ports
Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports
Figure B-11 and Figure B-12 show the schematics of four twisted-pair cables for
10/100/1000 ports on Catalyst 2950T-24 switches.
1 RD+
2 RD-
3 TD+
6 TD-
1 TD+
Switch Switch
2 TD-
3 RD+
6 RD-
4NC
5NC
7NC
8NC
4NC
5NC
7NC
8NC
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1 RD+
2 RD-
3 TD+
6 TD-
1 RD+
MT 10/100
Switch/Hub
2 RD-
3 TD+
6 TD-
4NC
5NC
7NC
8NC
4NC
5NC
7NC
8NC
65273