T568B Straight through cable (both ends the same)

Pin Colour Wire 10Base-T /
100Base-TX 		1000Base-T PoE Pin
1 White/Orange white/orange TX+ BI_DA+ Mode A +1
2 Orange orange TX- BI_DA- Mode A + 2
3 White/Green white/green RX+ BI_DB+ Mode A - 3
4 Blue blue - BI_DC+ Mode B + 4
5 White/Blue white/blue - BI_DC- Mode B + 5
6 Green green RX- BI_DB- Mode A - 6
7 White/Brown white/brown - BI_DD+ Mode B - 7
8 Brown brown - BI_DD- Mode B - 8

T568B Cross over cable

End 1 End 2
Pin Colour Wire Cross over Colour Wire Pin
1 White/Orange white/orange 1 - 3 / 3 - 1 White/Green white/green 1
2 Orange orange 2 - 6 / 6 - 2 Green green 2
3 White/Green white/green 3 - 1 / 1 - 3 White/Orange white/orange 3
4 Blue blue 4 - 7 / 7 - 4 White/Brown white/brown 4
5 White/Blue white/blue 5 - 8 / 8 - 5 Brown brown 5
6 Green green 6 - 2 / 2 - 6 Orange orange 6
7 White/Brown white/brown 7 - 4 / 4 - 7 Blue blue 7
8 Brown brown 8 - 5 / 5 - 8 White/Blue white/blue 8

Notes:

  1. For T568A cables, the green and orange wires are swapped.
  2. Some older cross over cables only cross wires 1, 2, 3 & 6.
  3. Some interfaces will automatically cross over, or automatically compensate for the partial (1, 2, 3 & 6) cross over.