Hello! Thank you for the answer. In our scenario PRACK is mandatory for using UPDATE, and NSN use UPDATE for puporse of implementation call forward on dialog early stage. And such call forward can not be done via 3xx.
I am looking if I can find now trace, but can definitly say: yes, all of the 183 responses have header "Require:100rel" included. Question is have Linksys any reason to not send second PRACK after 401 unauthorized? On Tue, Mar 17, 2009 at 12:27 PM, Arunachala <arun1...@gmail.com> wrote: > I am NOT very clear regarding the actual usage of 100rel in your scenario. > Note that for PRACK generation, '100 Trying' response is NOT > considered as provisional response. > > Linksys should generate PRACK only if the 18x response from NSN had > "Require:100rel. " > > A sniff file with the actual messages might be helpful here. -- Best regards, Igor Goncharovsky _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
