> > Is it must to send 'timer' tag extension in Supported: header > > if Session-Expire: 60;refresher=uac/uas header is present in > > a request? > > Adding supported timer is required if including refresher=uac. > > Adding supported timer is not required if included no refresher or > included refresher=uas. This simulates a proxy interaction.
I shouldn't have indicated that refresher=uas is allowed since proxy shouldn't have added refresher. RFC 4028 Table 2 indicates it is abnormal for refresher to be present within request when UAC does not indicate timer support. > > What should be the behaviour if UAS receives a message including > > the header "Session-Expire: 600;refresher=uac" but excluding the > > header "Supported:timer"? > > It is abnormal behavior (as indicated within RFC 4028 Table 2); thus it > can basically act however it desires (assuming RFC 4028 doesn't explicitly > define how to handle the abnormal situation). _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
