> Is it mandatory to send NOTIFY message with > "subscription expires" parameter
Yes; RFC 6665 made the expires parameter mandatory within some states (per bug 672). "If the value of the "Subscription-State" header field is "active" or "pending", the notifier MUST also include in the "Subscription-State" header field an "expires" parameter that indicates the time remaining on the subscription." _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
