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C-6 Compaq NC3134 Fast Ethernet Server Adapter User Guide
10/100 Crossover Pinouts
When the crossover function is not provided within the hub or switch, you must implement the
crossover through the twisted-pair media using the physical pinouts indicated in Table C-10.
Table C-10
10/100 Pinouts Using External Crossover
Pin Function Color Match Function Pin
1 TD+ White/Orange RD+ 3
2 TD- Orange/White RD- 6
3 RD+ White/Green TD+ 1
4 Blue/White
5 White/Blue
6 RD- Green/White TD- 2
7 White/Brown
8 Brown/White
Figure C-2 shows the correct 10/100 wiring to use when the crossover function is implemented
externally (in the twisted-pair cabling).
Figure C-2. External crossover for RJ-45 connector
Gigabit over Copper Internal Straight-Through Pinouts
Unlike some connections in which the crossover function is implemented internally at the hub
or switch, the NC7132 upgrade module provides its own automatic cross-over function. This
means you can wire twisted-pair media straight-through for adapter-to-hub or switch or adapter-
to-adapter connections, using the pinouts shown in Table C-11.
NOTE: To operate at Gigabit speeds, all four pairs of wires must be terminated within the RJ-45
connector.