B-4
Cables and Connectors
Twisted-Pair Cable/Connector Pin-Outs
Twisted-Pair Cable Pin Assignments
Twisted-Pair Straight-Through Cable
Twisted-Pair Crossover Cable
Switch End Computer, Transceiver, or
Other MDI Port End
Signal Pins Pins Signal
receive +
receive -
transmit +
transmit -
1
2
3
6
1
2
3
6
transmit +
transmit -
receive +
receive -
Switch End Hub or Switch Port, or Other
MDI-X Port End
Signal Pins Pins Signal
receive +
receive -
transmit +
transmit -
1
2
3
6
6
3
2
1
transmit -
transmit +
receive -
receive +