10/100/1000 Ports - Cisco Catalyst 2950 Hardware Installation Manual

Appendix B Connectors and Cables

10/100/1000 Ports

Note
78-11157-05
Figure B-1 10/100 RJ-45 Pinouts
Pin Label
1 RD+
2 RD-
3 TD+
4 NC
5 NC
6 TD-
7 NC
8 NC
The 10/100/1000 Ethernet ports on Catalyst 2950T-24 and Catalyst 2950
Long-Reach Ethernet (LRE) switches use standard RJ-45 connectors.
shows the pinout.
On the Catalyst 2950 LRE switches, the four input uplink ports are bundled as two
logical ports, each consisting of a copper 10/100/1000 port and a fiber-optic small
form-factor pluggable (SFP) module slot, respectively.
Within each logical port, you can use only the copper or the fiber-optic port at one
time. If the Catalyst 2950 LRE switch senses more than two connections for both
logical ports, the switch chooses the fiber-optic connections over the copper
connections in default operation.
See the "SFP Module Slots" section on page 2-14
uplink logical ports.
Catalyst 2950 Desktop Switch Hardware Installation Guide
Connector Specifications
1 2 3 4 5 6 7 8
Figure B-2
for more information on LRE
B-3