Path: utzoo!telecom-request Date: Sat, 8 Jun 91 03:04:04 -0400 From: westmark!mole-end!mat@uunet.uu.net Newsgroups: comp.dcom.telecom Subject: Re: Modification of Ringback Tone by Subscriber Apparatus Message-ID: Organization: TELECOM Digest 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 436, Message 9 of 11 Lines: 25 >>> Were you calling a commercial establishment? A college dorm or campus? >>> Some other place where you were dialing directly to an extension of a large >>> private network? >> To answer your question: I heard the double-ring when calling the >> "Management Services" department at Toronto City Hall. > 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. I don't believe so. If it's DID into a PBX, you shouldn't be billed until the PBX indicates that the call has been answered; the PBX can (and must, to be registered with the FCC) generate certain `call progress' tones before giving the electrical indication that the call has been answered (``returning answer supervision''). On the other hand, if you get an ``all of our agents are busy; please hold on'' message, the PBX should have returned answer supervision and you are being charged. (This man's opinions are his own.) From mole-end Mark Terribile