Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/5/84; site mnetor.UUCP
Path: utzoo!utcs!mnetor!george
From: george@mnetor.UUCP (George Hart)
Newsgroups: net.followup
Subject: Re: Anti-obscene phone calls ?
Message-ID: <366@mnetor.UUCP>
Date: Mon, 1-Apr-85 10:10:15 EST
Article-I.D.: mnetor.366
Posted: Mon Apr  1 10:10:15 1985
Date-Received: Mon, 1-Apr-85 12:24:04 EST
References: <19600001@hpfcmt.UUCP>
Organization: Computer X (CANADA) Ltd., Toronto, Ontario, Canada
Lines: 23

> Request for info.......anti-obscene phone call device
> 
> I have heard that there is a test marketing effort on in the Pennsylvania
> area where a device can be used on your phone which records the number
> ..

From what I understand about the telephone system, this would require
certain specialized equipment on the part of the Central Office Systems
involved.  The information on originating number is generally not available
the local C.O. (the one your phone is connected to).  To pass this and other
information requires Common Channel Signalling to be provided for end to
end control and information passing.  C.C.S in turn requires all digitial 
equipment.CCITT is trying to establish a standard for C.C.S. (I think it's
called CCS7). Right now, the only standard information passed back is
onhook/offhook and ringing information(in other words, the minimum needed
for billing :-). Even with CCS, I'm not sure provision is made for providing
originating number info to station equipment (your phone).

I'd be interested in knowing if this was being done by the regional Bell
company or one of the interconnect companies.

George Hart, Motorola New Enterprises
{cbosgd, decvax, harpo, ihnp4}!utcs!mnetor!george