Žgur, if 100rel supported, then first reliable response (101-199 / 2xx) 183 in your question, must carry the SDP offer.
RFCs 6337, 5407 might be useful http://tools.ietf.org/rfc/rfc5407.txt http://tools.ietf.org/rfc/rfc6337.txt On Thu, Mar 8, 2012 at 10:10 PM, Kevin P. Fleming <[email protected]>wrote: > On 03/08/2012 08:58 AM, Igor Žgur wrote: > > Hello! > > > > I'm sorry for bothering you, but i saw some answers that are really close > > to my specific situation - doing non-sdp call flow - i need just valid > sip > > signalling. > > > > IS IT VALID? SIP/SIPT between to SSW... > > > > Can i reply with 183 Progress(no sdp) and after 2-3seconds 180 Ringing(no > > sdp) on INVITE(no sdp) ? > > The SIP RFCs make no claims about the order that provisional responses > must be sent, if more than one will be sent (other than '100 Trying'). > If you are not sending the provisional responses reliably, then you are > not obligated to include an SDP offer in them just because the INVITE > did not contain an offer. > > -- > Kevin P. Fleming > Digium, Inc. | Director of Software Technologies > Jabber: [email protected] | SIP: [email protected] | Skype: kpfleming > 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA > Check us out at www.digium.com & www.asterisk.org > > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > -- Thanks, Nataraju A.B. _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
