T
ROUBLESHOOTING
16
connected straight through to pins 1, 2, 3, and 6 at the other end of the
cable.
Straight-Through Cable
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.
Pin MDI-X Signal
Name
MDI Signal Name
1 Receive Data plus
(RD+) Transmit Data plus (TD+)
2 Receive Data minus
(RD-) Transmit Data minus (TD-)
3Transmit Data plus
(TD+) Receive Data plus (RD+)
6Transmit Data
minus (TD-) Receive Data minus (RD-)
4,5,7,8 Not used Not used
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-)