Cisco WS-C3750G-24TS-E1U Hardware Installation Guide - Page 125
Connector and Cable Specifications, 10/100/1000 Ports
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APPENDIX B Connector and Cable Specifications This appendix describes the Catalyst 3750 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 3750 switches. 10/100/1000 Ports The 10/100/1000 Ethernet ports on Catalyst 3750 switches use standard RJ-45 connectors. Figure B-1 shows the pinout. Note On switches running Cisco IOS Release 12.1(14)EA1 or later, you can use the mdix auto command in the CLI to enable the automatic crossover feature. When the automatic crossover feature is enabled, the switch detects the required cable type for copper Ethernet connections and configures the interfaces accordingly. Therefore, you can use either a crossover or a straight-through cable for connections to a copper 10/100 or 10/100/1000 port on the switch, regardless the type of device on the other end of the connection. The automatic crossover feature is disabled by default. For configuration information for this feature, refer to the switch software configuration guide or the switch command reference. 78-15136-02 Catalyst 3750 Switch Hardware Installation Guide B-1