Paul Kyzivat wrote: > - a PRACK. But a PRACK can only be sent in response to a reliable > provisional. The assumption here is that the answer has not been sent > in a reliable provisional yet. So the PRACK would only be an option > if a reliable provisional *without* SDP was sent after sending an > answer in an unreliable provisional. This is a very weird case. Is this even allowed? I would think that once an answer has been sent in an unreliable provisional response, the identical answer MUST be included in (at least) the first reliable provisional response if one is sent. Allowing any sort of reliable response that does not contain an identical copy of the answer that was sent in an unreliable response seems like a recipe for disaster. -- Kevin P. Fleming Digium, Inc. | Director of Software Technologies 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA skype: kpfleming | jabber: kfleming@xxxxxxxxxx Check us out at www.digium.com & www.asterisk.org _______________________________________________ Sipping mailing list https://www.ietf.org/mailman/listinfo/sipping This list is for NEW development of the application of SIP Use sip-implementors@xxxxxxxxxxxxxxx for questions on current sip Use sip@xxxxxxxx for new developments of core SIP