Path: utzoo!attcan!uunet!cs.utexas.edu!sun-barr!texsun!texbell!vector!telecom-gateway From: dupuy@cs.columbia.edu (Alexander Dupuy) Newsgroups: comp.dcom.telecom Subject: Re: Audible Ringback vs. Ring Plant Message-ID: Date: 31 Jul 89 15:36:26 GMT Sender: news@vector.Dallas.TX.US Reply-To: dupuy@cs.columbia.edu Organization: Columbia University Computer Science Department Lines: 19 Approved: telecom-request@vector.dallas.tx.us X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@vector.dallas.tx.us X-TELECOM-Digest: volume 9, issue 268, message 9 of 11 In article John Boteler writes: Office Tone Plant ------ ---------- Rolm PBX lucky to get anything! Actually, with Rolm PBX's anything means just that! We have one of these monsters at Columbia now, and it has happened that someone calling me got a busy signal which changed to a ringback after I hung up on the previous call! What I'm curious to know is whether called party answer supervision works correctly in these cases, i.e. if someone calling long distance were to get a busy and hang on the line until I hung up on the previous call, would they only be billed after I had answered (assuming they were using an LD carrier which could detect answer supervision)? @alex inet: dupuy@cs.columbia.edu uucp: ...!rutgers!cs.columbia.edu!dupuy