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Archived - Ethernet: Crossover Cable Pinout

This article lists the pinout and signal assignments for a 10Base-T Ethernet crossover cable.
This article has been archived and is no longer updated by Apple.
Cabling should be Category 5 Unshielded Twisted Pair (UTP) wire for optimum performance.

Here are the pinout assignments:

From
To
1
3
2
6
3
1
4
none
5
none
6
2
7
none
8
none

Here are the signal assignments:
Pin
Signal
1
TD+
2
TD-
3
RD+
4
not used by 10BaseT (1)
5
not used by 10BaseT (2)
6
RD-
7
not used by 10BaseT
8
not used by 10BaseT

Notes:
    1. On a telephone line this is TIP.
    2. On a telephone line this is RING.
Last Modified: Feb 20, 2012
  • Last Modified: Feb 20, 2012
  • Article: TA25137
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