asterisk users - Nov 2008 - Codec problems when using G.723

Hi,

I have a problem with codecs.

I have an provider with allowed codec alaw, ulaw, g.723
I have SIP clients with codec allowed alaw, ulaw, g.723

If a SIP clients wants call through with g.723 Asterisk is using alaw to 
connect to the provider, so its not working because only passthrough would 
work.

How I can prevent this?

best regards
Thomas

The best (and maybe only way) is to set your client and your service 
provider to only do G.723.

Thomas Winter wrote:
> Hi,
> 
> I have a problem with codecs.
> 
> I have an provider with allowed codec alaw, ulaw, g.723
> I have SIP clients with codec allowed alaw, ulaw, g.723
> 
> If a SIP clients wants call through with g.723 Asterisk is using alaw to 
> connect to the provider, so its not working because only passthrough would 
> work.
> 
> How I can prevent this?
> 
> best regards
> Thomas
> 
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On Sunday 09 November 2008 20:14, Eric "ManxPower" Wieling
wrote:
> The best (and maybe only way) is to set your client and your service
> provider to only do G.723.
Really, thats not the way it should work.

How I can find out the codec of an incomming call?

Is there any way to use ${SIP_CODEC} to try to change to G.723 and then check 
success?
If OK use provider with only allowed G.723 and if not use provider with 
allowed alaw and ulaw?