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Date: Mon, 4 Feb 2008 22:15:30 +0100 (CET)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: David Banning <david+dated+1202587312.e4b61b@skytracker.ca>
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Cc: questions@freebsd.org
Subject: Re: question on DSL signal
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> without a single drop, while other times it's up for 30 seconds,
> down for a minute, up for 2 minutes, down for 1.  That can go on
> for 10 hours, and then maybe it's stable again for a day or so.
> It's always appears to be the DSL signal itself, as I can see the
> modem sync light starts flashing when the signal goes down.

make sure you don't get a timeout because of high load or simply - the 
server you ping doesn't respond.

> To end any possibility of the phone company pointing their finger
> at the wiring in my house, I put the DSL modem right at the phone
> connection block where the line enters the house and then called
> them. Problem persists.

looks like polish telecom isn't anyway  special ;)

> "found the problem", but when he's gone, the trouble starts again.

it's not line problem but modem hardware problem or their routing problem.