[Asterisk-Users] Maximum tollerable lag/jitter for IAX2 w/o j itterbuffer enabled?

[Kris Boutilier]

> -----Original Message-----
> From: Benjamin on Asterisk Mailing Lists
> [mailto:benjk.on.asterisk.ml at gmail.com]
> Sent: September 7, 2004 10:53 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] Maximum tollerable lag/jitter 
> for IAX2 w/o jitterbuffer enabled?
> 
> 
> On Tue, 7 Sep 2004 16:26:24 -0700, Kris Boutilier
> <kris.boutilier at scrd.bc.ca> wrote:
> >  I'm having a problem with intersite calls over IAX2 being abruptly
> > terminated. Nothing odd shows in any of the logs for 
> Asterisk or the host.
> > The only think I can think it might be is a lag-spike on 
> the site to site
> > connection.
> 
> When does the cut off occurr? Is it always after about 8-10 seconds?
> If so, you may have a problem with IAX transfer. You can verify this
> by using notransfer=yes.
> 

Having notransfer=no is beginning to sound like it's the culprit, but I
don't understand why. I don't see any related issues in bugs.digium.com nor
is there any intervening network equipment that would interfere with the
transit of packets between hosts (such as a NAT firewall).

The only thing that springs to mind, if it's all UDP driven, is a lack of
retry handler for the UDP handoff acknowledgement? I'm averaging about a
0.5% collision rate on this network (half-duplex 10Base-T)...

Kris Boutilier
Information Systems Coordinator
Sunshine Coast Regional District