[Asterisk-Users] One SIP peer use 2 diff codecs?

Roy Sigurd Karlsbakk roy at karlsbakk.net
Mon Dec 20 11:56:16 MST 2004


> I asked this question once before with no answer. Hopefully someone can
> help me as I cannot see a way to do this. I am wanting to differentiate
> inbound calls voice from FAX. The purpose of course voice gets g729 and
> FAX gets 711 (ulaw). The problem I'm having is everytime it matches the
> SIP peer (like it should) but it's always goes to the prefered codec.
> Anyone have suggestions on how to force 711 for fax detection?

exten fax,1,SetVar(SIP_CODEC=alaw)
exten fax,2, ...

AFAIK, this is implemented for outgoing calls only, although I don't  
think it'll be too hard to do it on incoming also.

roy




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