Cisco WS-C3750G-24TS-E1U Hardware Installation Guide - Page 126
Connecting to 10BASE-T- and 100BASE-TX-Compatible Devices, Connecting to 1000BASE-T Devices
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Connector Specifications Appendix B Connector and Cable Specifications 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-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 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-6 shows the two twisted-pair, crossover cable schematics. Figure B-10 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. Connecting to 1000BASE-T Devices When connecting the ports to 1000BASE-T 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-9 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. Figure B-10 shows the crossover cable schematics. Note Be sure to use a four twisted-pair, Category 5 cable when connecting to a 1000BASE-T-compatible device. 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. Catalyst 3750 Switch Hardware Installation Guide B-2 78-15136-02