Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!swbatl!texbell!vector!telecom-gateway From: ezf@bbn.com (Ed Frankenberry) Newsgroups: comp.dcom.telecom Subject: Re: Technical Question About Caller ID Message-ID: Date: 9 Oct 89 14:53:05 GMT Sender: news@vector.Dallas.TX.US Lines: 17 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 439, message 1 of 8 The calling number delivery specification is found in Bellcore TR-TSY-000030, "SPCS Customer Premises Equipment Data Interface", issue 1, November 1988. This technical reference describes the data signaling used from the central office. The receiving side is basically a simplex FSK modem operating at 1200 bps (like a Bell 202) during the silent interval following the first ring. For a generic description of the service, see TR-TSY-000031, "CLASS Feature: Calling Number Delivery", issue 2, June 1988. There's also another memo, TR-TSY-000391, "CLASS Feature: Calling Number Delivery Blocking", issue 2, June 1988, if you're interested. These documents can be ordered from: Bellcore Customer Service 60 New England Avenue, Room 1B252 Piscataway, NJ 08854-4196 201-699-5800