inline...
Paul Kyzivat wrote:
Christian Jansson wrote:
Bert Culpepper wrote:
Addressing Christian's last questions, the answerer CAN send
telephone-events (with PT 101) and the offerer should be prepared to
receive them. The 3rd paragraph in Section 5.1 of 3264 describes this.
IMHO, if it is desired to free an advertised codec that was not
advertised by the peer, the session needs to be re-negotiated.
I also think that that this is correct interpretation. If a UA has
advertised an offer, it has to re-negotiate or live with the offer as it
looked like when it was sent.
I reviewed 3264, and was about to reconsider and agree with the above
interpretation. Then I discovered the last paragraph of section 7:
The offerer MAY immediately cease listening for media formats that
were listed in the initial offer, but not present in the answer.
While this doesn't quite come out and say that the answerer can't send
those formats, it would make no sense to do so if the offerer isn't
going to process them.
I quit reading too soon :( This ia significant improvement/addition to
3261 & 2327 in codec negotiation IMHO. The last paragraph in section
10.2 describes an application of this, which applies to Christian's
original question and codecs can be released without additional signaling.
Regards,
Bert
So I continue to conclude that only those formats in the intersection of
the offer and answer may be sent, in either direction. Other formats
that might have been listed in the offer or answer may be helpful for
constructing future offers.
Paul
_______________________________________________
Sip-implementors mailing list
[email protected]
http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
_______________________________________________
Sip-implementors mailing list
[email protected]
http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
