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From: AI.CLIVE@MCC.ARPA (Clive Dawson)
Newsgroups: mod.telecom
Subject: Periodic noise on 1200 baud lines
Message-ID: <8512171032.AA13551@ucbvax.berkeley.edu>
Date: Thu, 28-Nov-85 19:07:24 EST
Article-I.D.: ucbvax.8512171032.AA13551
Posted: Thu Nov 28 19:07:24 1985
Date-Received: Wed, 18-Dec-85 03:03:20 EST
Sender: serge@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
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Approved: telecom@mit-xx.arpa

Dialup users of the various systems in our company have complained about
noisy telephone lines for quite a while, and it's generally accepted that
the quality of the trunks in this area is poor.   Recently, however,
we've had complaints from one particular user who says that he gets a
burst of noise consisting of a DEL followed by a {, PRECISELY every 30
seconds.  Does anybody know possible causes for this?  I remember an
item in Telecom sometime back about periodic glitches on synchronous
high speed lines, but I suspect this is unrelated.  Does the CO poll
phone lines to check for things like "off-hook" conditions, etc., which
might account for this?  

Thanks,

Clive

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