You can have Re-Invite without SDP also for 3PCC implementations. Thanks & Regards, Raju
----- Original Message ----- From: "Mayank Gupta" <mayank.16...@gmail.com> To: "Ritul Sonania" <ri...@in.niksun.com> Cc: <sip-implementors@lists.cs.columbia.edu> Sent: Friday, November 20, 2009 3:46 PM Subject: Re: [Sip-implementors] New offer answer using ReInvite and Update > Hi Ritul > > Is there any significance of this additional message for INVITE? > > ACK for initial INVITE request makes sense as it may be useful for > offer-answer when initial INVITE is without SDP and offer is received from > called party in 200 OK. In that case ACK will send the answer. > > But what is the use of ACK for re-Invite message? > > Mayank > > On Fri, Nov 20, 2009 at 3:41 PM, Ritul Sonania <ri...@in.niksun.com> > wrote: > >> >> > >> > Hi All >> > >> > I have a query regarding new offer-answer using Re-invite and Update >> > methods. >> > >> > When a new offer is sent using a Re-invite, it is responded by 200 OK >> > and >> > then ACK for this 200 OK is sent. >> > >> > --------------------> Re-Invite (for new offer) >> > <------------------- 200 OK >> > --------------------> ACK >> > >> > However, if a new offer is sent using an UPDATE method, there is no ACK >> > sent. >> > >> > ---------------------> UPDATE (for new offer) >> > <--------------------- 200 OK >> > >> > My query is why there is no ACK sent for the 200 OK for update message. >> >> ACK is only sent for INVITE request. >> >> Regards, >> Ritul Sonania >> Niksun >> >> > >> > Mayank >> > _______________________________________________ >> > Sip-implementors mailing list >> > Sip-implementors@lists.cs.columbia.edu >> > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors >> >> >> >> > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail immediately and permanently delete the message and any attachments. _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
