[asterisk-users] G.722: ast_channel_make_compatible failure

[Ondrej Valousek]

Hi Kevin,

Thanks for the answer - Hopefully this feature will be available some
day. My opinion is, look for a transcoder only if the two (or more)
parties does not offer any matching codec.
Good to hear it is being worked on....
Best regards,

Ondrej

Kevin P. Fleming wrote:
> Ondrej Valousek wrote:
>
>   
>> My problem is, that the phone offering g722 could do alaw as well.
>> I expected asterisk should just chose alaw for the communication - no
>> transcoding is necessary then...
>>     
>
> That is not how Asterisk works, and is well known in the community as
> something that users would like to see changed, but has not yet been
> done. Asterisk negotiates the codecs (formats) for each call leg pretty
> much independently of the others, so if a G.722 endpoint initiates the
> first call leg, and the destination call leg cannot accept G.722, and
> there is no transcoder available, then the call will fail. If the
> non-G.722 endpoint initiates the first call leg then the call will
> likely go through, which is somewhat unfortunate :-)
>
>   


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