Hi Pravin It is recommended for UAS to send 487 for pending requests in such scenarios. Refer Section 15.1.2 of RFC 3261:
" The UAS MUST still respond to any pending requests received for that dialog. It is RECOMMENDED that a 487 (Request Terminated) response be generated to those pending requests." Regards Preksha <http://tools.ietf.org/html/rfc3261#section-15.1.2> On Mon, Oct 7, 2013 at 4:49 PM, Pravin Kumar <pravink...@gmail.com> wrote: > According to RFC 3261: > Early Dialog can be terminate sending by BYE or CANCEL for UAC side. > In case of CANCEL we should send 487 for INVITE > > UAC UAS > > ---------INVITE---------------------> > < ---------180---------------------- > ----------CANCEL----------- > > < ---------200 CANCEL------- > < -----------487 --------------- > ------------ACK 487-----------> > > But in the of BYE: > > UAC UAS > > -------INVITE-----------------> > < ---------180----------------- > ----------BYE ---------------- > > < ---------200 BYE ----------- > <--(what should be send)----- (503 or 487) > ------------ACK -------------> > > So in the case of sending BYE by UAC , UAS should send 503 or 487 for > INVITE. > > Thanks, > Pravin > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > -- Regards Preksha _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
