Howto Make a T1 Crossover Cable

I learned this one about a month ago while turning up the T1 connection for my fax server. The tech that installed the Cisco equipment left us with a crossover cable, but a data one, so I cut the ends off and re-crimped the cable like so:

You only have to worry about 4 of the 8 wires if you are using typical cat-5 cable like I did.

1 <—> 4
2 <—> 5
4 <—> 1
5 <—> 2
Or if you go by colors like I do
Side 1 (left is cable end, clip underneath):
Pin 1: Orange White
Pin 2: Orange Solid
Pin 3: none
Pin 4: Blue Solid
Pin 5: Blue White
Pin 6: none
Pin 7: none
Pin 8: none

Side 2 (left is cable end, clip underneath):
Pin 1: Blue Solid
Pin 2: Blue White
Pin 3: none
Pin 4: Orange White
Pin 5: Orange Solid
Pin 6: none
Pin 7: none
Pin 8: none

Then you are done!