Path: utzoo!telecom-request Date: Tue, 30 Apr 91 13:34:34 EDT From: Tony Harminc Newsgroups: comp.dcom.telecom Subject: Re: Caller*ID Specifications Needed 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 320, Message 1 of 11 Lines: 41 David Berman wrote: > Question: Does anyone reading know what is sent out? How the phone > number or alpha information is encoded on the ring cycle? Has it been > done in a reasonable way so that decoding is sensible? (etc) Addresses > the future? > Or: Does anyone know where such information is published for > reference? This is rather old, but the only answer Dave received was flip, and not very helpful. So here again is the official place to get Bell Canada's version of Call Display technical disclosure information: Bell Canada Director - Switched Network Services 220 Laurier Avenue West Ottawa, Ontario K1G 3J4 +1 613 781-3655 The document is "Call Management Service (CMS) Terminal-to-Network Interface", Interface Disclosure ID - 0001, November 1989. (The document number may give you a clue as to how long this service has been running :-)) I was not charged for this document, but Bell does reserve the right to charge for it in future. It is only 18 pages so it seems unlikely they would charge a lot. They are required to disclose this information to anyone, so any charge would be administrative only - i.e. they cannot sell the information. Phone and find out. Please note that it is incorrect to call this "the Canadian Caller*ID standard". This document describes only what is being implemented by Bell Canada in its service areas. Other Canadian telephone companies may well implement something quite different, though it isn't too likely. Tony Harminc