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B-1
Catalyst 3550 Multilayer Switch Hardware Installation Guide
OL-6155-01
APPENDIX
B
Connector and Cable Specifications
This appendix describes the Catalyst 3550 switch ports and the cables and adapters that you use to
connect the switch to other devices.
Connector Specifications
These sections describe the connectors used with the Catalyst 3550 switches.
10/100 and 10/100 /1000 Ports
The 10/100 and 10/100/1000 Ethernet ports on Catalyst 3550 switches use standard RJ-45 connectors
and Ethernet pinouts with internal crossovers. Figure B-2 and Figure B-1 show the pinouts.
Figure B-1 10/100 Port Pinouts
H5318
231 45678Pin Label
1
2
3
4
5
6
7
8
RD+
RD-
TD+
NC
NC
TD-
NC
NC