Cisco WS-C3750X-24T-L Hardware Installation Guide - Page 128

B-5, 100 Port Pinouts

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Connector Specifications Appendix B Connector and Cable Specifications When connecting 10/100 ports to 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-5 shows the two twisted-pair straight-through cable schematics. Figure B-7 shows the four twisted-pair straight-through cable schematics. When connecting the ports to other devices, such as switches or repeaters, you can use a two or four twisted-pair crossover cable. Figure B-6 shows the two twisted-pair crossover cable schematics. Figure B-7 shows the four twisted-pair crossover cable schematics. 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. Note 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-2 10/100 Port Pinouts Pin Label 1 RD+ 2 RD- 3 TD+ 4 NC 5 NC 6 TD- 7 NC 8 NC 12345678 H5318 Catalyst 3750 Switch Hardware Installation Guide B-4 78-15136-02

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Appendix B
Connector and Cable Specifications
Connector Specifications
B-4
Catalyst 3750 Switch Hardware Installation Guide
78-15136-02
When connecting 10/100 ports to 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-5
shows the two
twisted-pair straight-through cable schematics.
Figure B-7
shows the four
twisted-pair straight-through cable schematics.
When connecting the ports to other devices, such as switches or repeaters, you can
use a two or four twisted-pair crossover cable.
Figure B-6
shows the two
twisted-pair crossover cable schematics.
Figure B-7
shows the four twisted-pair
crossover cable schematics.
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.
Note
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-2
10/100 Port Pinouts
H5318
23
1
45678
Pin
Label
1
2
3
4
5
6
7
8
RD+
RD-
TD+
NC
NC
TD-
NC
NC