Cisco Catalyst 3550

Appendix B Connector and Cable Specifications
Connector Specifications
B-2
Catalyst 3550 Multilayer Switch Hardware Installation Guide
78-11358-01
Note Use a straight-through cable to connect two ports when one of the ports is
designated with an X. Use a crossover cable to connect two ports when both
ports are designated with an X or when both ports do not have an X.
Figure B-1 10/100/1000 Port Pinouts
1000BASE-X GBIC Module Ports
1000BASE-X Gigabit Interface Converter (GBIC) module ports use duplex SC
connectors, as shown in Figure B-2.
Figure B-2 1000BASE-X SC Connector
1 2 3 4 5 67 8
Pin Label
1
2
3
4
5
6
7
8
TP0+
TP0-
TP1+
TP2+
TP2-
TP1-
TP3+
TP3-
34751
H8707
Tx Rx