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Article #21884

Re: Trace-Back on phones

#21884
From: Michael Hermann
Date: Sat, 23 Dec 1989 11:49
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Here at the University of Calgary, our new (3-4 years) PBX supports
"trace-back", displaying the originating number on phones which have an LCD.
The PBX is an SL100 made by Northern Telecom. The originating number is only
displayed sometimes, indicating that it'll work only if the caller is on a
central office with new equipment. Long distance calls invariably have the
calling number displayed, which I would assume means the long distance
consortium here (Teleglobe Canada) supports "trace-back" as well.

An idea for for those of us who might want to make use of this feature:
How about an answering machine that scans the header, and only lets the
call through if the calling number is on an "accepted" list?  8-) 8-)


|  Mike Hermann  | hermann@cpsc.ucalgary.ca ..!uunet!ubc-cs!calgary!hermann
_Organized_ religion is like organized crime; it generates huge profits, preys
on people's weaknesses, and is nearly impossible to eradicate.
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Message-ID: <2284@cs-spool.calgary.UUCP>
Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!mit-eddie!uw-beaver!ubc-cs!alberta!calgary!cpsc!hermann
References: <SAAF.89Sep12215929@joker.optics.rochester.edu> <89256.111005BHB3@PSUVM.BITNET> <4344@aplcen.apl.jhu.edu> <1732@limey> <5374@udccvax1.acs.udel.EDU>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!mit-eddie!uw-beaver!ubc-cs!alberta!calgary!cpsc!hermann
From: hermann@cpsc.ucalgary.ca (Michael Hermann)
Newsgroups: sci.electronics
Subject: Re: Trace-Back on phones
Summary: Supported in Canada
Message-ID: <2284@cs-spool.calgary.UUCP>
Date: 23 Dec 89 11:49:17 GMT
References: <SAAF.89Sep12215929@joker.optics.rochester.edu> <89256.111005BHB3@PSUVM.BITNET> <4344@aplcen.apl.jhu.edu> <1732@limey> <5374@udccvax1.acs.udel.EDU>
Sender: news@calgary.UUCP
Reply-To: hermann@cs-sun-fsg.UUCP (Michael Hermann)
Organization: U. of Calgary, Calgary, Alberta, Canada
Lines: 16