[asterisk-users] Poor sound quality on incoming calls

[Ryan Parlee]

Matthew,

I've read through the link and I believe my kernel is setup correctly,
however I am still experiencing this problem. 

I do not have a Digium card which this link says may be required, however, I
have no problems with my other Asterisk box running Asterisk 1.2.7.1 and
Linux 2.4.18-3.  That box has neither a Digium card nor the zaptel modules
and it runs fine.  Unfortunately I can no longer use that old box and my
brand-new box isn't working.  

I've really tried to figure this out myself but I'm not making any progress.


To hear what we're experiencing, call 515 333 4030

If anyone can help me out on this and is interesting in seeing my kernel
config or something else please let me know. 

Thanks, 
Ryan
 




-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Matthew J.
Roth
Sent: Tuesday, July 24, 2007 12:47 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] Poor sound quality on incoming calls

Ryan Parlee wrote:
> I am experiencing extreme jitter/slowdown on Playback() or Background().
> I've looked thoroughly on voip-info.org and elsewhere for help regarding
> this issue but cannot figure this out.  I can make outgoing calls with no
> problems.
>
> When I run zttest I get the following:
>
> Opened pseudo zap interface, measuring accuracy...
> -34.204102% -20.263672% -24.218750% -26.586914% -23.852539% -13.256836%
> -25.207520%
> -13.366699% -15.441895% -14.550781% -22.351074% -21.765137%
> --- Results after 12 passes ---
> Best: 0.000000 -- Worst: -34.204102 -- Average: -21.255493
>   
Ryan,

For some tips on fixing the playback issues, see this post: 
http://lists.digium.com/pipermail/asterisk-users/2007-June/189978.html

First, you may want to investigate why you are getting such poor 
accuracy from zttest.  It seems that you have an underlying problem.

Regards,

Matthew Roth
InterMedia Marketing Solutions
Software Engineer and Systems Developer


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