Path: utzoo!telecom-request
Date: Thu,  6 Jun 91 16:24:11 EDT
From: David E Martin <dem@iexist.att.com>
Newsgroups: comp.dcom.telecom
Subject: Re: Modification of Ringback Tone by Subscriber Apparatus
Message-ID: <telecom11.434.8@eecs.nwu.edu>
Organization: AT&T Bell Laboratories - Naperville, IL
Sender: Telecom@eecs.nwu.edu
Approved: Telecom@eecs.nwu.edu
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 11, Issue 434, Message 8 of 9
Lines: 16

In article <telecom11.425.2@eecs.nwu.edu> mitel!Software!grayt@
uunet.uu.net (Tom Gray) writes:

> The double ring will indicate that the destination has answered your
> call on its own equipment. The real implication of this is that you
> are now being billed for the time that you are listening to ringing.

Only if the PBX returns answer supervision at that point.  PBX's can
transfer you all over the place before signaling the calling CO that
the call is connected and billing should start.


David Martin, AT&T Bell Laboratories, Naperville, IL
dem@iexist.att.com, (708) 713-5121