> -----Original Message-----
> From: Francois Audet [mailto:[EMAIL PROTECTED] 
> Sent: 23 May 2007 21:37
> To: Dan Wing; Gonzalo Camarillo
> Cc: [email protected]; Paul Kyzivat; Christer Holmberg (JO/LMF)
> Subject: RE: [Sip] Support for Multipart/MIME
> 
> 
>  
> > In RFC3204, the QSIG or ISUP parts do not appear to have any 
> > meaning without the SDP.  Or do they?  For example, is it 
> > meaningful for me to send an INVITE that has only the QSIG 
> > part (and no SDP)?
> 
> Sure: it's just a delayed offer answer. 
[JRE]Moreover, QSIG or ISUP parts can be sent in other messages without
SDP, e.g., in an INFO request.

John


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