10/100 Dual-Speed Switch User’s Guide
30
Cables and Connectors
RJ-45 Pin Assignments
Contact MDI-X Port MDI-II Port
1 RD+ (receive) TD+ (transmit)
2 RD- (receive) TD- (transmit)
3 TD+ (transmit) RD+ (receive)
4 Not used Not used
5 Not used Not used
6 TD- (transmit) RD- (receive)
7 Not used Not used
8 Not used Not used
The standard RJ-45 pin assignments
Straight cable for use with MDI-II to MDI-X connections
With a crossover cable, two pairs of wires are switched at one
connector end. Carry out the following steps to create a customized,
crossover twisted-pair cable:
1.
Leave one end of the cable as is, with the RJ-45 connector
intact. The wiring at just one end of the cable needs to be
modified.
2.
At the other end of the cable, connect wires 1 and 2 to
contacts 3 and 6, respectively. Likewise, connect wires 3 and
6 to contacts 1 and 2. Refer to the following diagram:
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