[asterisk-users] Call quality

[Loic Didelot]

Hi,
its a new installation in a new office. Customer moved in, so right
moment to get a new PBX.

The box is running asterisk, nothing else:
 - asterisk
 - postfix just to send out voicemails
 - no realtime
 - som AGIS at call setup and call end
 - Asterisk 1.4.19.1-BRIstuffed-0.4.0-RC2
 - zaptel-1.4.10

We use a Junghann BRI card and a XORCOMM Analog Astribank. But only one
modem and 2 fax devices are connected to the astribank.


I did not do a debug on the spans. Anythin special I should look for?

Difficult to describe the audio:
 - basically echo is appearing
 - audio problems are only one way
 - audio has cuts when speaking



Best regards,
Loic Didelot.




On Tue, 2008-07-01 at 08:58 -0400, Steve Totaro wrote:
> On Tue, Jul 1, 2008 at 8:38 AM, Loic Didelot <ldidelot at mixvoip.com> wrote:
> > Hello,
> > one of my customers complained about bad voice quality on several calls,
> > so I programmed a button on each phone which users can hit if they have
> > audio drops and echo.
> >
> > I did this to check if there is a common recurrent problem to a given
> > destination or just for one user etc... But till now I could not detect
> > a pattern which could explain the problems
> >
> > This "alert button" is pressed between 7%-10% of all calls. The customer
> > has 25 phones and around 300 calls per day.
> >
> > The SNOM phones are connected to Linksys switches and are totaly split
> > from the computers network. The same goes for the asterisk box. No calls
> > are routed trough the internet.
> > Phone -> Local Lan -> Asterisk -> Zaptel (Junghanns BRI card) -> Carrier
> >
> > The carrier we use is known for his good quality and we never had a
> > problem. It is the historic and most expensive carrier in Luxembourg.
> >
> > Asterisk is running on a 1GHZ VIA CPU with 1GB RAM box. They have a
> > maximum of 6 concurrent calls.
> >
> > Maybe someone can help me to track down the problem. What should I
> > check, monitor test. Any ideas are welcome.
> >
> >
> > Best regards,
> > Loic Didelot.
> >
> > --
> > Loïc DIDELOT
> > MIXvoip S.a.
> > ldidelot at mixvoip.com
> > http://www.mixvoip.com
> 
> Is this a new install or a new problem?
> 
> If it is a new problem, what has changed?
> 
> If it is a new install, I would not rule out the provider, the more
> "historic" may or may not be a good thing.  Describe the audio when it
> is poor, popping, clicking, hissing?
> 
> Have you tried running a debug on the spans?
> 
> Thanks,
> Steve T
> 
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Loïc DIDELOT
MIXvoip S.a.
ldidelot at mixvoip.com
http://www.mixvoip.com