SMC Networks Barricade SMC7908VoWBRA2 User Manual page 144

C
ABLES
Crossover Wiring
If the port on the attached device has straight-through wiring (MDI), use
crossover cable.
Crossover Cable Pin Assignments
End 1
1 (Tx+)
2 (Tx-)
3 (Rx+)
6 (Rx-)
B-4
End 2
3 (Rx+)
6 (Rx-)
1 (Tx+)
2 (Tx-)