Flutterby™! : All these years and ridiculous trivia

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All these years and ridiculous trivia

2013-11-18 01:26:05.242892+00 by Dan Lyke 3 comments

All these years and ridiculous trivia lodged in my brain, and I still have to look up the colors when wiring up Cat5 connectors.

comments in ascending chronological order (reverse):

#Comment Re: made: 2013-11-18 03:35:58.45285+00 by: TheSHAD0W [edit history]

Brown, brown-white, green, blue-white, blue, green-white, orange, orange-white.

(Actually, if you're doing both ends, you can use whatever color code you want, so long as it matches. :-P )

#Comment Re: made: 2013-11-18 11:35:49.666558+00 by: meuon

TheShadow: That works on short cables... but the twist in the different colored pairs and cross talk (what wire is next to which) will cause issues on longer runs. The twist rate provides some inductive properties for common mode noise rejection, and different pitches work better at different frequencies. It's best to do it "per spec" and makes it much easier to replace a connector later.

#Comment Re: made: 2013-11-18 14:05:47.955075+00 by: Dan Lyke

That is per-spec: pair on the outside, split the middle pair with the other pair. Though I did have some issues yesterday with one of my cables and the POE injector... But everything's running now. D need to think about permanent ceiling mounts for the UniFi devices...