[asterisk-users] Poor sound quality on incoming calls

[Matthew J. Roth]

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