Re: [Sip] Early media as an endpoint application

["Dwight, Timothy M (Tim)" <[e-mail]>]

What if you want to implement those or similar services between VoIP end
systems?  For example what if you want to provide "color ringback tones"
between VoIP end systems?  There is no PSTN gateway involvement in such
services. 

tim

> -----Original Message-----
> From: [e-mail] [mailto:[e-mail]] On 
> Behalf Of Henry Sinnreich
> Sent: Thursday, August 21, 2008 10:17 AM
> To: Dean Willis; Dan Wing
> Cc: [e-mail]; [e-mail]
> Subject: [Sip] Early media as an endpoint application
> 
> I have changed the Subject title
> 
> Early media should just be an endpoint application when the 
> SIP endpoint is
> a PSTN gateway. This seems logical, or does it?
> 
> ===================
> 
> I agree that early media has no role in pure/clean IP-IP 
> communications, but
> only when connecting to the PSTN. Should early media support not be
> localized in the respective SIP endpoints, that is in the 
> SIP-PSTN gateway?
> 
> Support of early media in the SIP-PSTN gateway would resolve 
> this issue.
> 
> What do you think?
> 
> Henry
> 
> 
> On 8/20/08 5:40 PM, "Dean Willis" <[e-mail]> wrote:
> 
> > 
> > On Aug 20, 2008, at 2:22 PM, Dan Wing wrote:
> >> 
> >> There are some apparently-legitimate uses of early media,
> > 
> > No there aren't, IMHO.
> > 
> >> at least
> >> from the perspective of some network operators, to deliver things
> >> like "Than you for using <operator>", advertisements, colorful
> >> ringback
> >> (music as ringback), and so on.  Brian did a great write-up of many
> >> scenarios in the (now expired)
> >> draft-stucker-sipping-early-media-coping-03.txt.
> > 
> > Well, if you caveat it that way., then your statement is 
> correct. One
> > might reasonably ask if those operators don't simply have their
> > requirements confused.
> > 
> > My take, however, is that "early media" is a cop-out for 
> coping with a
> > fundamentally broken PSTN-interworking model, coupled with Bad Ideas
> > about charging based on signaling rather than content.
> > 
> > But like forking, this genie has left the bottle, and we 
> have to deal
> > with the consequences of that failing as long as we have SIP 2.0.
> > 
> > ---
> > Dean
> > 
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