[Asterisk-bsd] audio quality problems on IAX channels

[Konstantin Prokazoff]

Welcome,

	try to use internal_timing=yes in asterisk.conf.

Best regards,
        Konstantin Prokazoff
Center Of Excellence, S_V_R Ltd., Kyiv, Ukraine
Official business-partner and devconnect member of Avaya Inc.
Official business-partner and representative of CyberTech Inc.
Regional development and support center for Asterisk by Digium Inc.
tel. +38 044 594 1781, ext. 1038
fax. +38 044 234 0455
web: http://www.svr.kiev.ua
 


-----Original Message-----
From: asterisk-bsd-bounces at lists.digium.com
[mailto:asterisk-bsd-bounces at lists.digium.com] On Behalf Of Michael
Iedema
Sent: Thursday, September 06, 2007 5:18 PM
To: Asterisk on BSD discussion
Subject: [Asterisk-bsd] audio quality problems on IAX channels


Greetings everyone,
I'm experiencing some audio problems on IAX channels which I believe are
related to timing issues.

Running Asterisk 1.4.11 on FreeBSD 6.2-p7, I experience garbled /
robotic audio on IAX channels between my box and a IAX provider. GSM is
being used as it is the only choice so I have no chance to test out
another codec in my situation.

These issues were not present when I was running 1.4.9 and had no zaptel
modules loaded (except ztdummy). After upgrading to 1.4.10, the problem
appeared but was fixed in most situations by only loading either zaptel
driver modules or ztdummy. Loading both caused the problem. Only with
IAX channels do I still have bad audio.

Are there any "gotcha"s with IAX timing I should be aware of? Any
settings for the GSM codec or jitterbuffer which may remedy the
sitaution?

Thanks in advance,
-Michael I.

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