[asterisk-users] Re: Inbound Voice Quality - Speed Change

Jim Duda jim at duda.tzo.com
Tue Mar 27 18:30:36 MST 2007


Lacy,

I don't have any zaptel cards installed.  I do however have ztdummy 
installed.

Is there some tweaks to ztdummy which I might need?
Is there a special kernel setting which ztdummy requires?

Jim

Lacy Moore - Aspendora wrote:
> On 3/27/07, Jim Duda <jim at 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.
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