asterisk users - Mar 2007 - Inbound Voice Quality - Speed Change

Many times the "speed" of an inbound voice call changes.  It's
similiar
to playing a 33 LP at 45 speed.  Sometimes the voice becomes uneligible. 
  A "speed" change is the best way to describe it, seems like the
voice
packets are being played out too fast.

Can anyone explain what might cause this?  It doesn't always happen, and 
seem unpredictable.

Thanks,

Jim

On 3/27/07, Jim Duda <jim@duda.tzo.com> wrote:
> Many times the "speed" of an inbound voice call changes. 
It's similiar
> to playing a 33 LP at 45 speed.  Sometimes the voice becomes uneligible.
>  A "speed" change is the best way to describe it, seems like the
voice
> packets are being played out too fast.
>
> Can anyone explain what might cause this?  It doesn't always happen,
and
> seem unpredictable.
>
This sounds like a timing issue.  Do you have zaptel cards installed
or ztdummy?  If zaptel cards, are you getting your timing from the
telco or providing your own?  I shut off the line that was providing
timing from the telco on another system (not asterisk) and all heck
broke loose.  I had called to cancel the line a few days earlier and
it took a couple days for them to cancel it, so basically had
forgotten about it.  Took me awhile to figure that one out.

Could it possibly be a packetization rate issue with your provider?

On 3/27/07, Jim Duda <jim@duda.tzo.com> wrote:
>
> Many times the "speed" of an inbound voice call changes. 
It's similiar
> to playing a 33 LP at 45 speed.  Sometimes the voice becomes uneligible.
>   A "speed" change is the best way to describe it, seems like the
voice
> packets are being played out too fast.
>
> Can anyone explain what might cause this?  It doesn't always happen,
and
> seem unpredictable.
>
> Thanks,
>
> Jim
>
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