Absolutely.... Datacenters or more generically "premise wiring" should always adhere to EIA/TIA-568 "Commercial Building Telecommunications Wiring Standard". This standard includes not only the 568A/B ethernet cat5 wiring standards for pair assignment (USOC, ATT, etc.) but also defines standards for home runs, concentration methodologies, wiring closed standards, acceptable cable bend radius parameters, etc. etc. EIA/TIA-568 is the standard that most any wiring contractor uses. If memory serves, the standard also addresses color coding schemes on cable runs as well. I would bet that panduit's website would have details of the standard online. Jay West ----- Original Message ----- From: Bill Bradford <mrbill(a)mrbill.net> To: <classiccmp(a)classiccmp.org>rg>; <geeks(a)sunhelp.org> Sent: Sunday, July 29, 2001 11:52 PM Subject: EIA / telco "standards" for switch/datacenters?