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HP NC7770 PCI-X Gigabit Server Adapter User Guide C-3
Figure C-1: 10/100 straight-through wiring for RJ-45 connector
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-3.
Table C-3: 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 wiring to use when the crossover function is implemented
externally in the twisted-pair cabling.
Figure C-2: 10/100 external crossover for RJ-45 connector