[itu-sg16] AVD 3299

[Paul E. Jones]

Roni,

 

The proposal is limited to the case where multicast is used when a MC does
not exert control over the conference.  That is, when two devices are in a
point-to-point call.  One example of where this is useful is when a PBX
wants to put a call on hold and "music on hold" is broadcast by a server to
all devices that are on hold.  In this case, for example, a PBX (or phone)
might send a TCS=0 to the held party and then send an OLC proposing a
multicast address.

 

Any use of multicast that involves an MC (or transmission of the
communication mode table) is outside the scope of this proposed addition and
is already addressed by H.323.

 

Paul

 

 

From: Even, Roni [mailto:roni.even at polycom.co.il] 
Sent: Tuesday, January 29, 2008 12:25 PM
To: Paul E. Jones; itu-sg16 at lists.packetizer.com
Subject: RE: [itu-sg16] AVD 3299

 

Paul,

This works in point to point and I am not sure why you need multicast in
this case. Also you are not doing multicast H.245. So there is an MC

Now let's take the case of an MC that has three participants in the
multicast group.

The first one sends an OLC with payload type 100. The second one sends an
OLC with payload type 101 and the third with payload type of 102. Now the MC
needs to send an OLC to the first participant, which payload type should it
use 101,102,100? 

Roni

 

  _____  

From: Paul E. Jones [mailto:paulej at packetizer.com] 
Sent: Tuesday, January 29, 2008 6:47 PM
To: Even, Roni; itu-sg16 at lists.packetizer.com
Subject: RE: [itu-sg16] AVD 3299

 

Roni,

 

I guess I am still missing your point.  This is a means of sending media,
just like unicast.  The payload type numbers are selected by the sender,
just as they are for unicast.  If the recipient accepts the proposed OLC,
then it would listen on the multicast address for incoming media
accordingly.

 

Paul

 

 

From: Even, Roni [mailto:roni.even at polycom.co.il] 
Sent: Tuesday, January 29, 2008 11:24 AM
To: Paul E. Jones; itu-sg16 at lists.packetizer.com
Subject: RE: [itu-sg16] AVD 3299

 

Paul,

Is the multicast uni-directional, is it just a point to point. If it is to
be used to enable the EP to send media to a multicast group this should be
aligned with the media the other side except to receive. How does it get set

Roni

 

  _____  

From: Paul E. Jones [mailto:paulej at packetizer.com] 
Sent: Tuesday, January 29, 2008 6:20 PM
To: Even, Roni; itu-sg16 at lists.packetizer.com
Subject: RE: [itu-sg16] AVD 3299

 

Roni,

 

I don't understand your concern.  Can you clarify the problem?

 

Paul

 

 

From: itu-sg16-bounces at lists.packetizer.com
[mailto:itu-sg16-bounces at lists.packetizer.com] On Behalf Of Even, Roni
Sent: Tuesday, January 29, 2008 11:06 AM
To: itu-sg16 at lists.packetizer.com
Subject: [itu-sg16] AVD 3299

 

Hi,

I looked at the document and I think I understand the OLC procedure. I need
it does not address how you decide on a dynamic payload type number when
needed.

The OLC gives the dynamic payload type number to send

 

Roni

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