[Asterisk-Users] Problems with IAX2?

[Andres]

Our problem has certainly been bad with Nufone lately.  And now that 
somebody else confirmed their jitter buffer is disabled, this says it 
all.  We have not had any issues with other SIP providers though.  We 
are now in the process of testing alternate providers that can replace 
the backup service we use with Nufone now. 

Andres.

Rich Adamson wrote:

>>Check bug #1220, which involves IAX even though the subject doesn't tell you.
>>Mark has been working quite a lot to try to fix it.
>>
>>/O
>>    
>>
>
>It appears this bug has been closed by Mark as resolved yesterday. I don't 
>believe it actually is resolved as yet.
>
>I upgraded to dev cvs this morning (CVS-04/06/04-07:59:20 CDT) and connections
>via C7960 and IAX2 to the * demo are less then acceptable. Very choppy, sound 
>disappears for multiple seconds, some sounds repeat within a short period of 
>time (almost like an echo). I'm also hearing the same to other * machines
>for which we have iax connections (not just the demo server).
>
>Tested with both a C7960 (v6.3) and Snom 200 (v2.03o). The Snom reproduces very
>acceptable iax audio, while the 7960 on the same wire is far from usable.
>I tested both phones using g711 and g729 codecs; Snom was good with either
>codec while the 7960 was bad with either codec.
>
>I downgraded the 7960 to v6.0 and had the exact same quality problem.
>
>The Snom hangs in there very well with jitter exceeding 50 ms, while the
>7960 drops out even at 30 ms. "sip show channels" indicates no jitter while
>the "iax2 show channels" indicates anywhere from 20 ms to as high as 80 ms
>jitter (the snom hung in there at 80 ms too).
>
>I'm available today for testing if anyone has any ideas.
>
>Rich
>
>
>
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