asterisk users - Sep 2004 - Problems with native h323 channel on Asterisk RC2: No early audio and codec negotiation issues

Hello all,

We have been testing Asterisk RC2 with the native H323 channel driver. 
We followed the instructions with the needed OpenH323 and PWLib versions 
and everything compiled ok. Operation of  the driver seems ok, except 
from 2 main points:

1) Audio is passed between the two ends of the call only after the call 
is answered. This was not the case with previous versions of Asterisk 
(0.9.2 for example), in which audio would begin before the call was 
answered. Early audio is useful i order to provide the calling user with 
remote end ringback as well as recorded announcements, etc.

2) The codec capabilities that Asterisk sends seem strange. No matter 
which codecs we set in the h323.conf file, G711 is the only codec that 
is sent in the capabilities. In order to use any other codec, we have to 
enable only the needed codec and disable all others. Again, this problem 
did not exist in older * versions, like 0.9.2 and it's limiting the 
capabilities of Asterisk in H323.

Has anyone dealt with this problem successfully?

Best regards,

-- 
Vlasis Hatzistavrou.

On Thursday 16 September 2004 04:27 am, Vlasis Hatzistavrou
wrote:
> Hello all,
> 
> We have been testing Asterisk RC2 with the native H323 channel driver. 
> We followed the instructions with the needed OpenH323 and PWLib versions 
> and everything compiled ok. Operation of  the driver seems ok, except 
> from 2 main points:
> 
> 1) Audio is passed between the two ends of the call only after the call 
> is answered. This was not the case with previous versions of Asterisk 
> (0.9.2 for example), in which audio would begin before the call was 
> answered. Early audio is useful i order to provide the calling user with 
> remote end ringback as well as recorded announcements, etc.
You may want to look at/try this
http://bugs.digium.com/bug_view_page.php?bug_id=0000562
 
> 2) The codec capabilities that Asterisk sends seem strange. No matter 
> which codecs we set in the h323.conf file, G711 is the only codec that 
> is sent in the capabilities. In order to use any other codec, we have to 
> enable only the needed codec and disable all others. Again, this problem 
> did not exist in older * versions, like 0.9.2 and it's limiting the 
> capabilities of Asterisk in H323.
> 
> Has anyone dealt with this problem successfully?
> 
> Best regards,
> 
> -- 
> Vlasis Hatzistavrou.
> 
> 
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