Ya It can.

Example:

Video Telephony:
Where you send two m lines in SDP one for Video session another for audio
session.
Number of m lines will detemine the number of multimedia sessions.
While you make a video conference you have two sessions going on one is
video another is audio.

I hope it will clear your doubt.

Rgds
Nitin Arora

On Thu, Jun 26, 2008 at 1:10 PM, Iñaki Baz Castillo <[EMAIL PROTECTED]>
wrote:

> El Thursday 26 June 2008 07:12:09 Sudhir Kumar Reddy escribió:
> > Hi All,
> >
> > In SDP can we have two 'M' lines for re-INVITE i.e. for call hold.
>
> Of course. A re-INVITE is in fact an INVITE, no difference related to SDP
> (ewll, if you want to put on hold you send a specific SDP with "a=sendonly"
> for example or port 0).
>
> But anyway, a re-INVITE can have various M lines.
>
>
> > if yes what is RFC / draft
>
> Sure it appears properly in:
>   http://tools.ietf.org/html/rfc4566
>   http://tools.ietf.org/html/rfc3264
>
> --
> Iñaki Baz Castillo
> [EMAIL PROTECTED]
>
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