Path: utzoo!attcan!uunet!husc6!mailrus!ames!elroy!gryphon!vector!nobody From: westmark!dave@rutgers.edu (Dave Levenson) Newsgroups: comp.dcom.telecom Subject: Re: In-use light Message-ID: Date: 12 Nov 88 04:28:33 GMT Sender: chip@vector.UUCP Lines: 16 Approved: telecom-request@vector.uucp X-Submissions-To: telecom@bu-cs.bu.edu X-Administrivia-To: telecom-request@vector.uucp X-TELECOM-Digest: volume 8, issue 179, message 1 In article , berger@clio.las.uiuc.edu writes: > That's really pretty excessive. The polarity of the phone line changes > when any phone is off-hook... No. This is only true in a very small number of elderly step-by-step central offices. In most of the public switched telephone network, Tip is positive w.r.t. Ring, all of the time. You can pay extra, in some areas, for services that reverse the polarity with the called party answers, or when the originating party dials a toll call, etc.. -- Dave Levenson Westmark, Inc. The Man in the Mooney Warren, NJ USA {rutgers | att}!westmark!dave