And also as per RFC 2327, only v, o, s fields are mandatory in SDP
Somesh friend friend wrote: > Hi, > Thanks for your response. > > but RFC 2327 Grammar says like > > media-field = "m=" media space port ["/" integer] > space proto 1*(space fmt) CRLF > > > media = 1*(alpha-numeric) > ;typically "audio", "video", "application" > ;or "data" > > > Which means, one or more m line is mandatory rite. > > please correct me, if i am wrong. > > Regards, > vijay > > > > > > --- On Tue, 21/4/09, karthik karthik <[email protected]> wrote: > > > From: karthik karthik <[email protected]> > Subject: Re: [Sip-implementors] media line (m line) is mandatory in SDP? > To: [email protected] > Cc: "sip fourm" <[email protected]> > Date: Tuesday, 21 April, 2009, 7:36 PM > > > Hi, > Hope this thread has more info about this topic > https://lists.cs.columbia.edu/pipermail/sip-implementors/2008-October/020798.html > > Karthik > > > On Tue, Apr 21, 2009 at 7:31 PM, Frank Shearar <[email protected]> > wrote: > > > friend friend wrote: > >> Dear Friends, >> In SDP, media (m line) is mandatory? if so, if the UAC doesnt >> support video, audio, can the UAC send SDP like m: 0(zero)? >> >> Please clarify. >> >> > The m header is not mandatory. RFC 4566 section 5 says > > An SDP session description consists of a session-level section > followed by zero or more media-level sections. > > If the UAC supports no kinds of media it'll send no media-level > sections. Not very _useful_, since the UAS must respond with the same > number of media-level sections! > > frank > > > > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > > > > Cricket on your mind? Visit the ultimate cricket website. Enter > http://beta.cricket.yahoo.com > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
