Path: utzoo!telecom-request Date: Thu, 6 Jun 91 10:21:09 PDT From: Tom Ace 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 434, Message 7 of 9 Lines: 20 John Higdon writes: > ... If the reason you are hearing an unusual ringing > signal involves a PBX, it is probably a DID connection. Answer > supervision occurs when, and only when, the call is picked up by the > ringing extension. Busy, no answer, and even local customer intercept > recordings do not return supervision on a properly set up PBX. > In essence, the PBX becomes the terminating CO. It seems there's a potential for fraud here. I assume there are rules for what may be sent out as a local intercept without returning answer supervision. I assume that a call answered by a "we're closed now, call back in the morning" recording ought to be paid for. Are businesses with DID on an honor system in this regard? Tom Ace tom@aptix.com