[asterisk-bugs] [Asterisk 0015337]: Drawn out and static audio on inbound iax2 calls

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=15337 
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Reported By:                deitch
Assigned To:                dvossel
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Project:                    Asterisk
Issue ID:                   15337
Category:                   Channels/chan_iax2
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.6.1.0 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-06-16 17:49 CDT
Last Modified:              2009-07-03 11:57 CDT
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Summary:                    Drawn out and static audio on inbound iax2 calls
Description: 
Calls that are inbound on a DID, to which Asterisk has registered using
iax2, have terribly drawn out audio and a lot of static for prerecorded
files (e.g. IVR and Voicemail files in /var/lib/asterisk/sounds). They
sound like:
".... hhhheeeellllllloooooo..... Yyyyyyoooouuuu hhhhaaaavvvveeee " etc.

Specific details:
1) This occurs only on IAX2, not on SIP. I have tried with the exact same
providers, on the same hosts
2) jitterbuffer is off. If I turn jitterbuffer on, no audio at all is
audible.
3) This occurs across two completely separate providers, one in Israel,
one in the US. However, inbound from the ITSPs directly to an IAX2
softphone (e.g. JackenIAX or Zoiper) work perfectly fine.
4) This occurs only when communicating to Asterisk. If the dialer enters
an extension, and is thus connected over Asterisk to a SIP softphone, there
is no problem.
5) This occurs independent of codec. I have the original outbound files
converted to both ulaw and gsm, and it occurs in both cases. The provider
prefers ulaw.
6) CPU usage by Asterisk remains extremely low during the bad output.
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Relationships       ID      Summary
----------------------------------------------------------------------
related to          0015296 TDM call over IAX trunk gives choppy au...
related to          0015220 IAX2 choppy audio with MozIAX, only 20secs
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---------------------------------------------------------------------- 
 (0107394) deitch (reporter) - 2009-07-03 11:57
 https://issues.asterisk.org/view.php?id=15337#c107394 
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I will get to 1.6.0.10, but it will take a good few days.

-----BEGIN iax.conf-----
[general]

; These will all be included in the [general] context
#include iax_general_additional.conf
#include iax_general_custom.conf
#include iax_registrations_custom.conf
#include iax_registrations.conf

; These should all be expected to come after the [general] context
;
;iax_custom.conf is the proper place to start creating new contexts that
you
;might have a need for.  Dundi IAX trunks is one example of when this file
is needed.
;
#include iax_custom.conf
#include iax_additional.conf
;
;iax_custom_post.conf will allow you to modify FreePBX generated IAX
setups so
;that you can add additional parameters to a auto-generated setup.
;if you have a auto-generated context of [foobar] and need to add a
parameter
;to it then create this line [foobar](+) and place your additions on the
next line
;
#include iax_custom_post.conf
-----END iax.conf-----

-----BEGIN iax_general_additional.conf-----
disallow=all
allow=ulaw
allow=alaw
allow=gsm
mailboxdetail=yes
tos=ef
-----END iax_general_additional.conf-----

-----BEGIN iax_general_custom.conf
externhost=voice.atomicinc.com       ; refreshed periodically
externrefresh=180               ; change the refresh interval
localnet=192.168.0.0/255.255.255.0

;jitterbuffer=yes
;maxjitterbuffer=250
-----END iax_general_custom.conf

-----BEGIN iax_registrations.conf-----
; actual logins and passwords blanked out here
register=XXXXXX:XXXXXX at iax2.us4.voip.ms
register=XXXXXX:XXXXXX at 212.179.144.205
-----END iax_registrations.conf-----

All of the other iax*conf files includes are essentially blank. 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2009-07-03 11:57 deitch         Note Added: 0107394                          
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