Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!tut.cis.ohio-state.edu!purdue!decwrl!shelby!lindy!ucscb.UCSC.EDU!sorka From: sorka@ucscb.UCSC.EDU (Alan Waterman) Newsgroups: sci.electronics Subject: Re: Trace-Back on phones Message-ID: <6693@lindy.Stanford.EDU> Date: 22 Dec 89 22:21:27 GMT References: <89256.111005BHB3@PSUVM.BITNET> <4344@aplcen.apl.jhu.edu> Sender: news@lindy.Stanford.EDU (News Service) Reply-To: sorka@ucscb.UCSC.EDU (Alan Waterman) Distribution: sci Organization: UCSC Undergrads Lines: 14 In article <4344@aplcen.apl.jhu.edu> jdc@aplvax.jhuapl.edu (James David Cover) writes: >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) I would also like to get info on this subject.