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, 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(Tx+)
1(Tx+)
2(Tx-)
2(Tx-)
3(Rx+)
3(Rx+)
6(Rx-)
6(Rx-)
Crossover RJ-45 Pin Assignments
End 1
End 2
1(Tx+)
3(Rx+)
2(Tx-)
6(Rx-)
3(Rx+)
1(Tx+)
6(Rx-)
2(Tx-)