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Cables and Connectors24
Contact MDI-X Signal MDI Signal
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
Crossover Cables
When cascading or connecting the hub to another switch, bridge, or hub
through the UTP port, a modified crossover cable is necessary. 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: