On Thu, 2008-02-21 at 16:33 -0800, Dushyant Godse wrote: > Hello > I was referencing the RFC 3515 regarding messaging for transfers based > on SIP REFER. > Is the UA processing the REFER required to send NOTIFY subscription > event messages to the sender agent notifying the progress of the > transfer like 100 trying, 180 ringing, 200 OK. Is this a MUST? > > I am pasting below a snippet of the RFC which says it must. I would like > to confirm this within the forum > If a REFER request is accepted (that is, a 2xx class response is > returned), the recipient MUST create a subscription and send > notifications of the status of the refer as described in Section > 2.4.4.
What is the ambiguity? MUST means what it says. _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
