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

[Steve Totaro]

Which revision of the Digium TDM400?

On Sat, Mar 8, 2008 at 10:24 AM, Royce Souther <osgnuru at gmail.com> wrote:
> 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?
> > >
> > > --
> > > Open Source: To innovate then create
> > > Proprietary: To imitate then litigate
> >
> >
> >
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