asterisk users - Aug 2006 - weird sound with IAX

Hello,


 I am having very weird sound on IAX protocol (using SIP, it seems to
work OK). I use Asterisk 1.2.10.

 As a client, I use Idefisk. Today, i let two completely different
asterisk machines talk to each other, with more or less same results.

 I currently do not use IAX trunking. This test was performed on 1Gbps
ethernet with no packet loss with ulaw codec (no transcoding on the
way):

http://flz.sk.cx/audio/20060831-181241_59206988_to_.wav.mp3

  Any help would be greatly appreciated. I looked at voip-info.org,
but saw no troubleshooting info for IAX.


        Thanks,


              Juraj Bednar.