Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!netsys!vector!telecom-gateway
From: zygot!john@apple.com (John Higdon)
Newsgroups: comp.dcom.telecom
Subject: Re: While Phone Rings, Charges May Begin [from LA Times]
Message-ID: <telecom-v09i0239m04@vector.dallas.tx.us>
Date: 14 Jul 89 06:55:54 GMT
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In article <telecom-v09i0233m09@vector.dallas.tx.us>, ron@ron.rutgers.edu (Ron
Natalie) writes:
> Further more, the ring the caller hears may have nothing to do
> with the ringing the phone gets.  Calling adjacent CENTREX
> extensions in my office causes me to hear the ring not in
> phase with the ringing noise my phone makes.

Ah, that's the key. What you observe is ringback tone "out of phase"
with the ringing current on the called line. It will, however, have
identical cadance. Ringing current may actually be applied before the
first cycle of ringback tone. But it is incorrect to say that which the
caller hears has NOTHING to do with ringing current.
--
        John Higdon         |   P. O. Box 7648   |   +1 408 723 1395
      john@zygot.uucp       | San Jose, CA 95150 |       M o o !