Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!accuvax.nwu.edu!nucsrl!telecom-request From: Todd Inch Newsgroups: comp.dcom.telecom Subject: Re: Loop Start vs Ground Start, a User Intro Message-ID: <6274@accuvax.nwu.edu> Date: 10 Apr 90 21:57:24 GMT Sender: news@accuvax.nwu.edu Reply-To: Todd Inch Organization: Global Tech Int'l Inc. Lines: 25 Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 10, Issue 247, Message 10 of 14 This information on ground-start vs. loop-start has been great - thanks all. How 'bout some more details, please? F'rinstance: Whats the difference in the phone sets for ground start vs loop start? (Does anyone even make a ground-start phone, or do they always get "converted" to loop by the PBX's?) For example, how would you use a butt set to connect and place a call on a loop start line? Do you need an earth-ground connection, or temporary earth-ground connection? If you were to build a ground-start phone, would it need three wires? Also, are ground-start lines available from all CO's? Are they the same cost (typically) as a "business" POTS/loop-start line? Are ground-start lines ever used for residential service? Were the grounds required on old phones just for the ringer? Todd Inch, System Manager, Global Technology, Mukilteo WA (206) 742-9111 UUCP: {smart-host}!gtisqr!toddi ARPA: gtisqr!toddi@beaver.cs.washington.edu