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- Newsgroups: comp.protocols.tcp-ip
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbfsb!cbnewsf.cb.att.com!eajjs
- From: eajjs@cbnewsf.cb.att.com (john.sottile)
- Subject: Re: Why does my slip line die overnight?
- Message-ID: <1992Sep1.170624.4502@cbfsb.cb.att.com>
- Keywords: slip
- Sender: news@cbfsb.cb.att.com
- Organization: AT&T
- References: <ghawkins.714919621@unix1.tcd.ie> <1992Aug30.205245.29936@psg.com> <z5h1H206b9@atlantis.psu.edu>
- Date: Tue, 1 Sep 1992 17:06:24 GMT
- Lines: 38
-
- In article <z5h1H206b9@atlantis.psu.edu> barr@pop.psu.edu (David Barr) writes:
- >In article <1992Aug30.205245.29936@psg.com> randy@psg.com (Randy Bush) writes:
- >>ghawkins@unix1.tcd.ie (George C. Hawkins) writes:
- >>> When I leave my machine overnight and come back in the morning I
- >>> find my slip connection has died on me.
- >>
- >>We see the same thing here in Orygun's RAINet. We believe (urban legend)
- >>that the telco does an 02:00 blast to clear the lines.
- >
- >Yep, i've seen similar experiences here, only here it's around 1:30.
- >It won't necessarily be all the lines, but a significant portion of them.
- >
-
-
- Between the hours of 2am and 5am, the telecos telephone switches go into
- diagnostics. On older switch types (analog) can get noise on the
- line when this happens, but it doesn't last long (the noise).
-
- The dropped line is purely UNintentional. The switches must go through
- diags and 2am is a good time to start.
-
- Also, when switches are upgraded (software or hardware), the telco will
- "Phase" a machine to get it to start with the new load. 98% of the time
- no calls are dropped, however, if something went wrong with a load,
- the machine will recover and a few calls could be dropped. Usually,
- the recovery will drop all calls, but not always.
-
- I would suspect a PBX first (reacting to stuff on the line) before
- the telco. :-)
-
- =============================
- John Sottile "That Guy has to Oil his Brakes!"
- AT&T Bell Labs #include <std/disclaimer/who-me?.h>
- jjs@cblph.att.com
-
- Let me add this:
- I don't speak for AT&T and the ideas presented here are my own from my
- own observations.
-