Subject: RE: [Sip] Re: SDP hold

From: "David R. Oran" <[email-masked]>
Date: Mon, 27 Aug 2001 17:44:00 -0400

> -----Original Message-----
> From: [email-masked] [mailto:[email-masked]] 
> On Behalf Of [email-masked]
> Sent: Wednesday, August 22, 2001 3:13 PM
> To: 'Jonathan Rosenberg'; 'Colin Perkins'; Gonzalo Camarillo 
> Gonzalez (LMF)
> Cc: [email-masked]; mmusic
> Subject: RE: [Sip] Re: SDP hold 
> 
> 
> I thought the entire point of the inactive attribute
> was to specify a stream that did not send RTP -or- RTCP.
> 
> If we accept the following:
> 
> 1) send-only: RTP one way, RTCP two way
> 2) recv-only: RTP one way, RTCP two way
> 3) send-recv: RTP two way, RTCP two way
> 4) inactive:  no RTP, RTCP two way
> 5) XXX: no RTP, no RTCP ???
> 
> Then what is used to specify the fifth item
> (no RTP, no RTCP)?
>
An SDP which does not include that media stream.
 
> /sean
> 
> 
> >-----Original Message-----
> >From: Jonathan Rosenberg [mailto:[email-masked]]
> >Sent: Wednesday, August 22, 2001 1:30 PM
> >To: 'Colin Perkins'; Gonzalo Camarillo
> >Cc: Jonathan Rosenberg; [email-masked]; mmusic
> >Subject: RE: [Sip] Re: SDP hold
> >
> >
> >So, here is an important question on the inactive attribute.
> >If a stream is
> >inactive, is RTCP sent? I think it probably should, 
> >actually... RTCP helps
> >to keep state alive in various places, and this session is 
> >still alive, just
> >suspended.
> >
> >THoughts?
> >
> >-Jonathan R.
> >
> >
> >---
> >Jonathan D. Rosenberg, Ph.D.                72 Eagle Rock Ave.
> >Chief Scientist                             First Floor
> >dynamicsoft                                 East Hanover, NJ 07936
> >[email-masked]                     FAX:   (973) 952-5050
> >http://www.jdrosen.net                      PHONE: (973) 952-5000
> >http://www.dynamicsoft.com
> > 
> >
> >> -----Original Message-----
> >> From: Colin Perkins [mailto:[email-masked]]
> >> Sent: Wednesday, August 15, 2001 5:30 AM
> >> To: Gonzalo Camarillo
> >> Cc: Jonathan Rosenberg; [email-masked]; mmusic
> >> Subject: Re: [Sip] Re: SDP hold
> >> 
> >> >a=inactive
> >> >    This specifies that the tools should be started in inactive
> >> >    mode.  This is necessary for interactive conferences
> >> where users can
> >> >put other users on hold. No media is sent over an inactive
> >> media stream.
> >> >It can be either a session or media attribute, and is not
> >> dependent on
> >> >charset.
> >
> 
> 

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