Cisco Catalyst 3550

B-1
Catalyst 3550 Multilayer Switch Hardware Installation Guide
78-11358-03
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.
10/100/1000 Ports
The 10/100/1000 Ethernet ports on Catalyst 3550 switches use standard RJ-45
connectors. Figure B-1 shows the pinout.
Connecting to 10BASE-T- and 100BASE-TX-Compatible Devices
When connecting the ports to 10BASE-T- and 100BASE-TX-compatible devices,
such as servers, workstations, and routers, you can use a two or four twisted-pair,
straight-through cable wired for 10BASE-T and 100BASE-TX. Figure B-7 shows
the two twisted-pair, straight-through cable schematics. Figure B-9 shows the
four twisted-pair, straight-through cable schematics.
When connecting the ports to 10BASE-T- and 100BASE-TX-compatible devices,
such as switches or repeaters, you can use a two or four twisted-pair, crossover
cable. Figure B-8 shows the two twisted-pair, crossover cable schematics.
Figure B-12 shows the four twisted-pair, crossover cable schematics.