Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!bellcore!texbell!vector!telecom-gateway
From: westmark!dave@uunet.uu.net (Dave Levenson)
Newsgroups: comp.dcom.telecom
Subject: Re: Crosstalk Problem
Message-ID: 
Date: 12 Aug 89 20:36:36 GMT
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X-TELECOM-Digest: volume 9, issue 293, message 5 of 5

In article , siegman@sierra.stanford.
edu (Anthony E. Siegman) writes:
> I have a crosstalk problem between my two residential lines, and would
> appreciate suggestions for alleviating same.
 ...
> Situation: Two residential lines coming into my house -- an old
> installation, no conduit, the incoming service is just a lead-sheathed
> bundle of 4 wires coming under the street and up out of the ground at
> my outside utility box (can't add a 3rd line for my modem!).
 ...
> weather proof wires under eaves), and also as a four-wire cable (NOT
> two twisted pairs, at least I don't believe so, just 4 colored wires)


The problem is that the two lines run parallel in a non-twisted
cable.  Twisted pairs are used to reduce electromagnetic coupling
between the circuits.  Four-wire station quad is not intended for
use in carying two lines, though it's often done without problems
for short runs.  Perhaps you can use the existing quad as a drag
line to help pull through the twisted pair that will replace it!

--
Dave Levenson                Voice: (201) 647 0900
Westmark, Inc.               Internet: dave@westmark.uu.net
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