asterisk users - Feb 2005 - how to make g.729 preferred, but failover to gsm

how to make g.729 preferred, but failover to gsm

I've purchased a few g.729 licences, and would like to set up iax.conf 
such that g.729 is used if they are available, but then it fails over to 
gsm.

I'm not sure how to specify such a preference. I'll let the server 
transcode from ulaw (from the sip phones) to g.729. Got plenty of CPU for 
the number of phones we run off that server...

TIA!

-Ron
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<snip>
how to make g.729 preferred, but failover to gsm 

I've purchased a few g.729 licences, and would like to set up iax.conf 
such that g.729 is used if they are available, but then it fails over to 
gsm. 

I'm not sure how to specify such a preference. I'll let the server 
transcode from ulaw (from the sip phones) to g.729. Got plenty of CPU for 
the number of phones we run off that server... 
</snip>

The reason I ask this, is that I set iax.conf to 
disallow=all
allow=g729
allow=gsm

But it doesn't failover to gsm even if out of licenses. Instead, it keeps 
trying to connect, flooding the console with

Feb  8 11:44:38 WARNING[6062098]: codec_g729.c:259 lintog729_framein: Out 
of G.729 Encoder Licenses!
Feb  8 11:44:38 WARNING[6062098]: codec_g729.c:180 g729tolin_framein: Out 
of G.729 Decoder Licenses!

The user experiences a call that doesn't seem to connect.

I would like to use g729, but don't want to have to buy a ton of them 
'just in case.'

TIA,
-Ron
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