C
ABLES
32
Straight-Through Wiring
If the twisted-pair cable is to join two ports and only one of the
ports has an internal crossover (MDI-X), the two pairs of wires
must be straight-through.
Crossover Wiring
If the twisted-pair cable is to join two ports and either both ports
are labeled with an “X” (MDI-X) or neither port is labeled with an
“X” (MDI), a crossover must be implemented in the wiring.
Straight-Through RJ-45 Pin Assignments
End 1
End 2
1 (RD+)
1 (TD+)
2 (RD-)
2 (TD-)
3 (TD+)
3 (RD+)
6 (TD-)
6 (RD-)
Crossover RJ-45 Pin Assignments
End 1
End 2
1 (TD+)
3 (RD+)
2 (TD-)
6 (RD-)
3 (RD+)
1 (TD+)
6 (RD-)
2 (TD-)
