Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!brutus.cs.uiuc.edu!wuarchive!swbatl!texbell!vector!telecom-gateway From: khl@cunixc.cc.columbia.edu (Kenneth H. Lee) Newsgroups: comp.dcom.telecom Subject: Twisted Pair Color Coding Message-ID: Date: 31 Jul 89 13:34:55 GMT Sender: news@vector.Dallas.TX.US Lines: 43 Approved: telecom-request@vector.dallas.tx.us X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@vector.dallas.tx.us X-TELECOM-Digest: volume 9, issue 266, message 4 of 9 W (hite), R (ed), B (lack), Y (ellow), V (iolet) Bl (ue), Or (ange), Gr (een), Br (own), Sl (ate) W/Bl, Bl/W W/Or, Or/W W/Gr, Gr/W W/Br, Br/W W/Sl, Sl/W R/Bl, Bl/R R/Or, Or/R R/Gr, Gr/R R/Br, Br/R R/Sl, Sl/R B/Bl, Bl/B B/Or, Or/B B/Gr, Gr/B B/Br, Br/B B/Sl, Sl/B Y/Bl, Bl/Y Y/Or, Or/Y Y/Gr, Gr/Y Y/Br, Br/Y Y/Sl, Sl/Y V/Bl, Bl/V V/Or, Or/V V/Gr, Gr/V V/Br, Br/V V/Sl, Sl/V Each bundle of 25 pairs is coded in this manner. To distinguish a wire, you need to look at both wires in the pair. W/Bl, which is White/Blue, is a wire with a wide spiral of white and narrow of blue. Whereas Bl/W, Blue/White has a wide spiral of Blue with a narrow spiral of white. In our installation, the term used for each bundle was a 'bin'. I'm not sure if this is what is used out in the rest of the industry. If you have more than one bin of 25 pairs in a cable, each bin of is surrounded by tracers which use a color scheme similar to the wires. For example, if you had a 200 pair cable, you would have 8 bins of 25 pairs each. bin tracer color 1 W/Bl 2 W/Or 3 W/Gr 4 W/Br 5 W/Sl 6 R/Bl 7 R/Or 8 R/Gr I hope this is useful. This is all from the back of my memory and some old notes I have. I haven't worked for the Data Communication group in a while so I can't vouch for the accuracy this information. Kenneth H. Lee khl@cunixc.cc.columbia.edu Columbia University ...{topaz|rutgers}!columbia!cunixc!khl 209 Watson, 612 West 115 Street khlcu@cuvmc.bitnet New York, NY 10025 (212) 854-8230