All things related to multicast

[Richard Mavrogeanes <>]

Hi Marshall,

As you know, we already support this RFC for backwards compatibility, and
the VBricks you have can stream to the IP/TV viwer and the SAP's are picked
up by the cisco content manager. System Streams are, IMHO, superior but are
not picked up by the cisco. You are correct that raw system streams over
UDP/IP have not been described by an accepted RFC, but we're working on
that.  

I refer to the "cisco format" in reference to their particular behaviors and
due to the seemingly wide scale use in this community. Also, it happens to
be convenient language for many of our customers, but I realize imprecise
for this group.  I stand corrected.

Rich












-----Original Message-----
From: Marshall Eubanks 
[mailto:]
Sent: Thursday, March 21, 2002 3:33 PM
To: Richard Mavrogeanes; 'Alan Crosswell'
Cc: Marshall Eubanks; Philip Pishioneri; 

Subject: Re: request for signalreport


On Thu, 21 Mar 2002 15:05:40 -0500
 Richard Mavrogeanes 
<>
 wrote:
> The VBrick streams UDP/IP system streams, and also (at
> the same time if
> desired) RTP streams in the cisco format.  Most people
> use UDP/IP.  The
> UDP/IP System Stream does not appear in the cisco
> product...the so-called
> content manger, because that server only supports cisco
> format.  MPEG-1
> System streams are not proprietary, and there is a free
> player available.
> 
> rich
> 

Hi Rich;

   It is not a Cisco format. It is part of the Internet
protocol, RFC 2250

http://www.ietf.org/rfc/rfc2250.txt

It was not developed by Cisco, and is supported by many
major players such as RealOne and Apple Quicktime.

I would be glad to help you get your system format into the
Internet protocol, although it will be tough going if it is
not carried by RTP.

Regards
Marshall


> 
> 
> -----Original Message-----
> From: Alan Crosswell 
> [mailto:]
> Sent: Thursday, March 21, 2002 3:02 PM
> To: Alan Crosswell
> Cc: Marshall Eubanks; Philip Pishioneri; Alan Crosswell;
> 
> Subject: Re: request for signalreport
> 
> 
> > >vBrick offers their propriatary system streams in
> addition
> > >to rtp, which has very good synchronization, but
> requires
> > >their propriatary player.
> > 
> > How come I can watch CSPAN from Northwestern using IPTV
> viewer?  It
> appears
> > to be coming as Vbrick's UDP stream (to a single
> multicast group as raw
> > UDP).
> > 
> > Joel must be out of town as I sent him mail asking how
> he configured
> > his but received no reply.
> > /a
> > 
> 
> PS: This is a VBRICK model 1200 (MPEG-1) as contrasted
> with their MPEG-2
> model.
> /a