Connecting To 1000Base-T-Compatible Devices - Cisco WS-C2950-24 Hardware Installation Manual

Connector Specifications

Connecting to 1000BASE-T-Compatible Devices

Note
Note
Catalyst 2950 Desktop Switch Hardware Installation Guide
B-4
You can use Category 3, 4, or 5 cabling when connecting to
10BASE-T-compatible devices. You must use Category 5 cabling when
connecting to 100BASE-TX-compatible devices.
When connecting the ports to 1000BASE-T-compatible devices, such as servers,
workstations, and routers, you must use a four twisted-pair, Category 5,
straight-through cable wired for 10BASE-T, 100BASE-TX, and 1000BASE-T.
Figure B-10 shows the straight-through cable schematics.
When connecting the ports to other devices, such as switches or repeaters, you
must use a four twisted-pair, Category 5, crossover cable.
crossover cable schematics.
Be sure to use a four twisted-pair, Category 5 cable when connecting to a
1000BASE-T-compatible device.
Use a straight-through cable to connect two ports only when one port 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-3 RJ-45 Pinouts for 10/100/1000 Ports
Pin Label
1 TP0+
2 TP0-
3 TP1+
4 TP2+
5 TP2-
6 TP1-
7 TP3+
8 TP3-
Appendix B Connectors and Cables
Figure B-11
1 2 3 4 5 6 7 8
shows the
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