[Asterisk-Users] dropped calls when g729 is used on sip leg

[Mojo with Horan & Company, LLC]

This post is exactly my problem:
http://lists.digium.com/pipermail/asterisk-users/2005-July/117988.html

Has anybody encountered this and been able to solve it and use g729 
successfully?  Are there other g729 implementations available as a codec 
for asterisk?

Mojo

Mojo with Horan & Company, LLC wrote:
> Hello - I have 8 polycom 501s all setup great using ulaw.  We have put 
> them through a pretty rigorous torture over the last 4 months, and 
> they've performed famously.  No dropped calls ever.
> 
> We invested in some g729 licenses.  changed my ipmid.cfg so that g729 is 
> priority 1 and ulaw is priority 2.  I added allow=g729 to my extension's 
> sip.conf entry, where existed before disallow=all and allow=ulaw.
> 
> told asterisk to do a reload, and tried dialing out on a zap line.  It 
> was obvious from the call quality that g729 had been selected, and I 
> double-checked and triple-checked by
> 1) a sip show peer 112 shows:
>    Codecs       : 0x104 (ulaw|g729)
>    Codec Order  : (g729,ulaw)
> 
> and 2) the status of the current call as reported by the phone's menu 
> system  shows it using g729 as well.
> 
> So, great.  lower network usage, and the quality is good.  And if I call 
> another polycom configured the same way, they drop asterisk per 
> canreinvite=yes, and continue their happy g729 way.
> 
> After an indeterminate amount of time, sometimes 30 seconds and 
> sometimes 5 minutes, one of two things happens: first, sometimes, the 
> zap leg just disappears.  I don't get any messages on the CLI at verbose 
> level 30 and debug level 30.  The SIP leg stays connected, but the audio 
> trails out into a lovely mash of codec ether before silence.  The phone 
> remains off-hook when this happens, and it just remains silent.  So I 
> didn't think sip debug logs would help, but I will post them if someone 
> thinks it might help.  Secondly, sometimes, the zap leg doesn't 
> disappear, but audio is not delivered from the g729-using polycoms to 
> the zap callee.  I hear them but they are just hello?  hello?.  Neither 
> of these things happen when the phones runs in ulaw.
> 
> Does anyone have any idea where to look? I'll post whatever logs anyone 
> thinks might help.
> 
> I'm using 1.2.0b1, but this occurred with my CVS HEAD of around 
> 7/20/2005 as well.
> 
> Thanks!
> 
> Mojo
> 
> 
> 

-- 
Mojo <mojo at horanappraisals.com>
Office Manger, Horan & Company, LLC
(907) 747-6666 x112