[asterisk-users] Customer complains of noise on line I cannot reproduce.

[Royce Souther]

IRQ's seem to have been the problem. Thanks Steve Totaro for that tip.

The Digium cards were at the same IRQ as the IDE controller, I moved the
cards and hard drives to a different system and all is good now.

Thanks.

On Wed, Feb 27, 2008 at 12:11 PM, Steve Totaro <
stotaro at totarotechnologies.com> wrote:

> Check for IRQ issues, move the card to a different slot.
>
> You could ask permission to record calls so maybe you can hear the
> sound yourself.
>
> I would then go ahead and swap out cards.  I have had TDM400 with bad
> modules and also bad ports on the cards themselves, so it could a
> hardware issue.
>
> This is what I suspect, especially if you did not put any surge
> suppression on your telco lines.  Usually, at least in my experience,
> ticks or beeps indicate IRQ, hissing or loud static indicate something
> with/on the board is bad.  ALWAYS use surge suppression on your lines!
>
> Thanks,
> Steve Totaro
>
> On Wed, Feb 27, 2008 at 11:36 AM, Royce Souther <osgnuru at gmail.com> wrote:
> > I have setup a few Asterisk systems for customers using Digium TDM400
> cards
> > and Aastra phones. No problems with sound quality at all except at this
> one
> > site.
> >
> > Every time I try their system I don't hear any problems but they tell me
> > that it is really bad. They describe it a a loud scratching sound.
> >
> > Are there any tests that can be done to pinpoint the problem? Has anyone
> > seen this before? Are there known causes for this?
> >
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