> I have a query in Session timer functionality, > UAC sends an invite without Session-Expires Header > but supports timer, upon receiving a 200 OK > response to this with Session-Expires header > without refresher parameter, what should be the > behavior of UAC. Whether UAC should establish > the Call by sending ACK or establish and terminate > immediately or UAC should Ignore such responses > as refresher parameter is mandatry in the 200 ok > response.
It is an abnormal situation; thus you can act however you want. For historical purposes, the refresher parameter was not added to draft until draft-ietf-sip-session-timer-05. Thus the situation should only occur when interacting with older products. _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
