Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!mit-eddie!killer!vector!nobody From: amdcad!amdcad.AMD.COM!rpw3@ames.arc.nasa.gov (Rob Warnock) Newsgroups: comp.dcom.telecom Subject: Re: Subscriber's Line Cross-connected Message-ID: Date: 8 Feb 89 01:53:19 GMT Sender: chip@vector.UUCP Lines: 33 Approved: telecom-request@vector.uucp X-Submissions-To: telecom@bu-cs.bu.edu X-Administrivia-To: telecom-request@vector.uucp X-TELECOM-Digest: volume 9, issue 51, message 3 In article rwatkins@BBN.COM writes: +--------------- | Having just received my ATT phone bill, I note there were | 10 long distance calls that I didn't make [on second phone line]... | this second phone line has never had a "phone" on it....just my modem... | thus NET belives that my wires are "cross connected" somewhere... | I was only concerned because NET said the problem is very | hard to find and it could persist for months.... +--------------- There exist boxes (try Radio Shack) that show you if a phone line is "off hook". (Basically, they measure the voltage.) And if your modem is at all standard, it will assert "Data Set Ready" iff it is off-hook. Thus, if you bought a telephone recording "tap" (~$20 at Radio Shack), and rigged it to run when the other box showed off hook *and* your modem did *not* show DSR, you should be able to tape the "other" traffic on "your" line as evidence. That is, it may be hard for NET to find, since they can't see your modem, but it shouldn't be too hard for you to give them a little help. (What can they do, even then? Well, if you called them and said, "That other guy is on my line *RIGHT NOW*, they might be able to run a TDR measurement and find out [approximately] where the other phone is.) Rob Warnock Systems Architecture Consultant UUCP: {amdcad,fortune,sun}!redwood!rpw3 ATTmail: !rpw3 DDD: (415)572-2607 USPS: 627 26th Ave, San Mateo, CA 94403