[Asterisk-Users] Connecting two phones with different codecs

[Paul Hales]

>From memory, it's really down to making the right selections in sip.conf

We did a large installation, with phones at the Head Office using g711
and phones at remote sites using g729.

Asterisk happily transcoded for us. Which was great.

PalH


On Wed, 2006-02-15 at 15:37 +1100, Lisa Wolf wrote:
> I've got a situation here that I thought was trivial.  I have two 
> phones, and an asterisk box.
> 
> The first phone knows about g723, alaw and g729, as does the second phone.
> sip.conf has allows for those codecs.
> 
> Now, within the dialplan I make a determination which codec will be used 
> (this is a simulation, obviously.  Think 'within the office', 'to 
> another office' and 'to a device that only knows g723').
> 
> I do this with setvar(SIP_CODEC=[appropriatecodecname]).  Then I can 
> either do an immediate answer, or wait for the other end to pick up to 
> ensure the answer.
> 
> However, what I'm finding is that the originating phone decides on the 
> codec specified in SIP_CODEC, but the destination phone replies with its 
> preferred codec (whichever I specified first) out of the three.  If this 
> isn't what I put in the SIP_CODEC, then asterisk is unable to connect 
> the channels.
> 
> My question is this: is it possible for the codec chosen with something 
> like the SIP_CODEC to be 'passed' to the second channel as the only 
> choice?  Or another way to get asterisk to determine the codec that 
> should be used based on destination?
> 
> Thanks,
> Lisa
> 
> _______________________________________________
> --Bandwidth and Colocation provided by Easynews.com --
> 
> Asterisk-Users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users