Crimping Cat5e cable, color order that is already crimped in wall does not match any wiring diagram I've found - AVS Forum
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post #1 of 6 Old 10-22-2012, 10:32 PM - Thread Starter
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It's been a long time since I've crimped cable, but the order of the colors for the cable that's already been crimped in the wall does not appear to match any diagram I've found online. Here's the best picture I've managed to take:

http://i.imgur.com/QSugI.jpg

From what I see here the order is:

Brown/White
Brown
Orange
Blue
Blue/White
Orange/White
Green/White
Green

I'm guessing that if I stay in this same order I should be fine, but I don't want to do too much trial and error since I only have so much cable coming out of the wall.

Looking at the bottom of the jack with the male connector facing up, if I go in the reverse order (from left to right starting with green) should it work?
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post #2 of 6 Old 10-23-2012, 12:18 AM - Thread Starter
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Can confirm this worked. I just took an old patch cable and arranged the wires as described above to test, after that I gave it a go and everything is working fine smile.gif
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post #3 of 6 Old 10-23-2012, 12:37 AM
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Both ends have to match. You've got 568A or 568B

568A
white / green
green
white / orange
blue
white / blue
orange
white / brown
brown

568B (this is what I use)
white / orange
orange
white / green
blue
white / blue
green
white / brown
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post #4 of 6 Old 10-23-2012, 04:52 PM - Thread Starter
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The installer switched a few of the pairs so it was neither 568A or 568B. I've been told that although this will likely work to wire it as it has been done, it would be better to redo what is in the punch plate so that it is either 568A or 568B; there is more likely to be degradation of signal and/or increased crosstalk on the line if the pairing doesn't adhere to one of the standards.
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post #5 of 6 Old 10-27-2012, 02:12 PM
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The installer is an idiot. You do not make up your own color code as you go, otherwise it makes it difficult to troubleshoot and for anyone else afterwards as it doesn't conform to any standard. I would wire it all T568B at every termination point period! If you want a crossover you change one end to T568A. The End. Its your wire though so do what you like.
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post #6 of 6 Old 10-27-2012, 02:33 PM
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Quote:
Originally Posted by DraZtiK View Post

The installer is an idiot. You do not make up your own color code as you go, otherwise it makes it difficult to troubleshoot and for anyone else afterwards as it doesn't conform to any standard.
I don't think he was an idiot, I think he wired it for a business telephone system. I've seen other 6-wire installations wired that way for PBX systems (prior to VOIP).
Quote:
I would wire it all T568B at every termination point period! If you want a crossover you change one end to T568A. The End.
I agree. Terminating is not that hard, and you might as well have it right.
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