My perplexion is rooted precisely in the fact that no dialog has been established upon a negative final reply to the invite transaction.
On March 25, 2018 6:27:03 PM EDT, Paul Kyzivat <pkyzi...@alum.mit.edu> wrote: >On 3/25/18 5:26 PM, Alex Balashov wrote: >> Hi, >> >> Are 407 challenges meant to have a To tag? If so, I can't find the >> rationale in 3261. Any pointers would be appreciated. > >(working from memory) > >An argument against to-tag in 407 would presumably apply equally to any > >3xx, 4xx, 5xx, or 6xx. One could argue that the to-tag is for >establishing a dialog, and if no dialog has been established then it >isn't needed. > >OTOH, AFAIK the requirement to include a to-tag is across the board. > > Thanks, > Paul >_______________________________________________ >Sip-implementors mailing list >Sip-implementors@lists.cs.columbia.edu >https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors -- Alex -- Sent via mobile, please forgive typos and brevity. _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
