Path: utzoo!attcan!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!know!zaphod.mps.ohio-state.edu!julius.cs.uiuc.edu!apple!motcsd!mcdcup!mcdhup!mcdchg!ddsw1!corpane!disk!wells From: wells@disk.UUCP (Lee Wells) Newsgroups: comp.dcom.lans Subject: 10BaseT wiring question Keywords: 10 Base T, 10BaseT, 10-Base-T, wiring, installation Message-ID: <4136@disk.UUCP> Date: 20 Sep 90 16:37:02 GMT Distribution: na Organization: Digital Information Systems of Ky (DISK), Louisville, Ky Lines: 44 As part of our building renovation, we are getting ready to replace all our phone wiring. We'll be running two cables from the wiring closet on each floor to each station. Each cable will have 4 twisted pairs. In most cases, one cable will be used for voice, and the other cable will be used for 10BaseT Ethernet. Of course in special cases, we may use both cables for 10BaseT, or both cables for voice. We've gotten specs on three different types of wiring: AT&T AT&T Brand Type 2021 D plenum "X" Mutual capacitance (pF/ft) 12 17 16.2 DC resitance (ohms/1000ft) 25.7 27.3 25.7 Impedance (ohms) @1KHZ N/A N/A 600 @1MHZ 122 100 110 Attenuation (dB/1000ft) @1KHZ 0.39 0.67 0.44 @.1MHZ 1.8 2.7 N/A @1MHZ 5.1 8.2 6.4 All solid copper, 24 gauge. The question, of course, is which wire is "best" for 10BaseT, or are none of them appropriate? Alternatively, where can one get recommended wiring specs for 10BaseT? Please mail your response, will post a summary if appropriate. -- Lee Wells (pick one address) wells@disk.UUCP DISK Inc. [a Nixpub machine] att!chinet!mcdchg!ddsw1!corpane!disk!wells 502 968 5401 to 5406 [modems] uunet!ukma!corpane!disk!wells Louisville, Kentucky U.S.A. arpa!e.ms.uky.edu!corpane!disk!wells