Why not? You should try. During the voice communication, codecs switched well.
At least with SIPUA that I tried to use.(not so much,btw)


2013/4/2 Daniel Ivanov <sertys@gmail.com>

I remember fairly well that there is dynamic codec negotiation in fs from a big thread here on the list. My question is can i use this to overcome transcoding difficulties for ringback. I have g729 licences on the box, but prefer amr for mobile connections. Can i send early media in g729 and then switch to amr for actual call?


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