So, the combination

client A sends:
INVITE
m= G726, G729, G723, PCMA, PCMU

client B responses:
200OK
m= G729, PCMA

resulting in

A====G729====>B
A<====G726====B

is a correct signalling regarding to RFC3264 SIP/SDP offer-answer?

br
Michael


On 2010-03-15 16:54, Iñaki Baz Castillo wrote:
> 2010/3/12 Aneesh Naik <[email protected]>:
>> Hi Michael,
>>
>>      This will not be allowed. A (UAC) has sent all the codecs it supports,
>> and B (UAS) has respoded with the codecs it is willing to talk to A for this
>> call. Only one codec will be negotiated for media transfer between A and B.
>> In your example below, the negotiated codec is G.729, so both the parties
>> must send media on G.729 codec.
>>
>> If the codec needs to change it between, then there can be a Re-NVITE to
>> change the codec, and both parties once aggreed will start talking on that
>> new codec negotiated.
> 
> This is not true :(
> 

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