Path: utzoo!attcan!uunet!aplcen!aplvax.jhuapl.edu!jdc
From: jdc@aplvax.jhuapl.edu (James David Cover)
Newsgroups: sci.electronics
Subject: Trace-Back on phones
Message-ID: <4344@aplcen.apl.jhu.edu>
Date: 19 Dec 89 14:18:05 GMT
References: <SAAF.89Sep12215929@joker.optics.rochester.edu> <89256.111005BHB3@PSUVM.BITNET>
Sender: news@aplcen.apl.jhu.edu
Reply-To: jdc@aplvax.jhuapl.edu (James David Cover)
Distribution: sci
Organization: The Johns Hopkins University Applied Physics Laboratory
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The question I have is whether or not anyone knows anything about whether or
not one can run a traceback on a phonecall.  A friend of mine says that the
phone company is now transmitting a "header" with the call that, if one knows
the format, could decode it at display the calling number.

I would appreciate any information, possible ic's that might do the decoding,
theory, specifications, etc.  Please reply via e-mail.  Thanx.

				J. David Cover (jdc@aplvax.jhuapl.edu)