Path: utzoo!attcan!uunet!pyrdc!netsys!vector!chip From: chip@vector.UUCP (Chip Rosenthal) Newsgroups: comp.dcom.telecom Subject: Tap Detectors Message-ID: Date: 3 Nov 88 12:05:06 GMT References: Organization: State University of New York at Stony Brook Lines: 16 Approved: telecom-request@vector.uucp X-Submissions-To: telecom@bu-cs.bu.edu (TELECOM Digest Coordinator) X-Administrivia-To: telecom-request@vector.uucp (USENET Telecom Moderator) X-TELECOM-Digest: volume 8, issue 170, message 4 In article , hobbit@topaz.rutgers.edu (*Hobbit*) writes: > think a "clean" line is. Having a TDR helps too... I've TDR'ed my phone line on occasion just for kicks. I have to wonder whether it is really possible to spot anything but a bug that is grossly mismatched to the phone line, as the average line is so junky that you would be astounded. I can spot things like the transition from internal wiring -> interface, maybe phone poll wiring, but not much else. A bug that is capacitively coupled into the line would be most difficult to see on the TDR (especially if placed near the interface); it would also slip by the DC level detector type "tap spotters". Rick Spanbauer SUNY/Stony Brook