[Asterisk-Users] Re: Asterisk Crackly Bad quality

[Rich Adamson]

> > I have * running on Mandrake 10.1 and I to had similar problems in the 
> > begging but as soon as I had ztdummy configured correctly everything 
> > seemed to just fall into place and work with IAX and *, not that I have 
> > got a perfect dialplan as that confuse's me but hey thats another subject.
> 
> The problems you had and were resolved with ztdummy, were they primarily
> IAX related ?
> 
> Since, after all, the main channels relying on special timers are
> Meetme, IAX and (maybe) MusicOnHold according to
> http://www.voip-info.org/wiki-Asterisk+timer
> 
> Just want to be sure, since I still believe my mere demo playback
> issue likely has a different reason ...

I'm 95% sure iax is not dependent on the ztdummy type timers.

Maybe the OP could give us a little more detail on the specific data flow
that he's having an issue with. I interpreted his call problem as:
 sipdev1 -> ? -> teliax.com -> iax -> OP-asterisk -> sipdev2

He indicated sipdev1 was running VAD, and the call was completed via
teliax.com to his asterisk with crackly audio.

If this "is" the case, the issue is VAD between sipdev1 and the "?"
box shown in the data flow. Since there isn't a consistent flow of
rtp data packets between sipdev1 and "?" because of VAD, what gets
sent to teliax.com is already choppy audio. There is nothing the
OP is going to be able to fix between teliax.com and sipdev2 to 
correct for a problem that is located elsewhere.