Path: utzoo!attcan!uunet!decwrl!hayes.fai.alaska.edu!accuvax.nwu.edu!nucsrl!telecom-request
From: ritchie@hpdmd48boi.hp.com (David Ritchie)
Newsgroups: comp.dcom.telecom
Subject: Re: The Truth About "Cleaning Pulses"
Message-ID: <9839@accuvax.nwu.edu>
Date: 17 Jul 90 03:39:38 GMT
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X-Telecom-Digest: Volume 10, Issue 493, Message 7 of 9


>In brief, I have heard that at one time AT&T sent out "cleaning
>pulses" in the wee hours of morning to "fuse shorts in the line."

>Assuming this is drivel, is there any basis for such a thing?

>Andrew Houghton
>(ah0i@andrew.cmu.edu)

  Actually, many switches have an automatic loop quality test that is
done on lines in the early morning hours. I had a friend with a cheap
phone who complained about this causing his phones to click at 2 A.M.


Dave Ritchie

[Moderator's Note: *Something* happens here every morning at 1:37 AM.
If I am online to Northwestern at that moment, the modem connection is
dropped and I have to dial back in. Every day, no exceptions. I do not
know if it is Illinois Bell or something at Northwestern.  PT]