Connectors and Cables

This appendix describes the cables and connectors for the Catalyst 2900 series modules.

The 10/100 module ports are marked with an X, indicating that they have their transmit (TD) and receive (RD) signals internally crossed for attachment of an Ethernet adapter using a straight-through cable.

When connecting the 10/100 ports to 10BaseT or 100BaseTX servers and workstations, ensure that you use a Category 5 straight-through cable. When connecting to other switches or repeaters, ensure that you use a crossover cable.

The schematics of crossover and straight-through cables are shown in Figure B-1.

Figure B-1: Cros sover and Straight-Through Cable Schematics

Note Always observe the following general rules when connecting devices: use a straight-through cable to connect two ports when one is designated with an X; use a crossover cable to connect two ports when both are designated with an X.

10/100 Module Connectors

The 1000BaseT module has one or more RJ-45 connectors on the front panel. Figure B-2 shows the pinout.

Figure B-2: 10/100BaseT RJ-45 C onnector

1000BaseT Module Connectors

The 1000BaseT module has one RJ-45 connector on the front panel. Figure B-3 shows the pinout.

Figure B-3: 1000BaseT RJ-45 Connector

100BaseFX and 1000BaseX Modules Cabling

The 100BaseFX and the 1000BaseX modules use duplex SC connectors. This type of connector is shown in Figure B-4.

Figure B-4: 100BaseFX and 1000BaseX SC Connector

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