[Asterisk-Users] IAX and Jitter problem

[silverflash at bancclub.net]

Hello, 

I've been playing around with * for quite a while now, and have run into a 
problem that I just cannot seem to figure out. 

When using * and any IAX client (I have tested with GnoPhone and both 
clients from iaxclient.sourceforge.net) I have incredibly bad jitter on the 
connection. 

What I'm running is a P3-1Ghz machine with 512mb ram for a server.  The 
other end has been various machines (all connected via 100mb switch) ranging 
from a AMD K6-2 350 running Win98 to another P3-1Ghz running RH Linux 9.0 
and GnoPhone. 

I've tried changing the jitterbuffer settings in iax.conf (including turning 
it off as I've seen some recommendations on the archives) and I've even 
tried rebuilding zaptel with the various jitter control switches. 

At this point I have extension 8500 setup to take me to voicemailmain.  When 
I connect (IAX only - I do not have any Digium cards in the server at all) I 
can generaly not tell what is being said at all.  I've used sox and a player 
and know that the .gsm files are okay. 

Anybody have any suggestions of what to try?   So far this has been 
something I've been playing with before I attempt to put it in a production 
system, but so far am not having a whole lot of luck. 

I've not been able to try SIP as of yet, as I've not found a softclient and 
the application I will be using * for would require this. 

Thanks,
Mike Atkinson