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
