[Asterisk-Users] need help troubleshooting clipping and garbled VOIP calls

[T. Shaw]

thanks for all the responses. I feared that it might be a bandwidth issue. 
We have a (supposedly) business DSL line that is 1.5M - 3M down/ 512k up.  
might have to bump that up to a higher grade.

I did take your suggestion and contact my VOIP provider. They suggested to 
two things:
1) Use SIP to trunk with them instead of IAX ( they said that lots of people 
complain about the conenction with IAX, but when they use SIP the issues get 
better)

2) they can use GSM, and to try that as well (they also use Asterisk on 
their end)


I first tried switching to GSM to see if that clears up some quality issues 
( since it was the quicker of the two).

I'm doing some test calls now.

Thanks again everyone who responded..

Terrelle






>From: Colin Anderson <ColinA at landmarkmasterbuilder.com>
>Reply-To: Asterisk Users Mailing List - Non-Commercial 
>Discussion<asterisk-users at lists.digium.com>
>To: 'Asterisk Users Mailing List - Non-Commercial 
>Discussion'<asterisk-users at lists.digium.com>
>Subject: RE: [Asterisk-Users] need help troubleshooting clipping and 
>garbled VOIP calls
>Date: Thu, 29 Jun 2006 14:33:21 -0600
>
> >It seems only the Far-end (called party), is hearing this and not the
> >calling party.
>
>So, looks like the A in ADSL is showing here. What is your upstream
>bandwidth? If it is < 1mbit this is the most likely cause. If your VoIP
>provider allows it, change your codec to GSM, which IMO has the best
>bandwidth management of the non-licensed codecs. It can only help.
>
>good luck, hth
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