Re: INFO

Precisely. To be blunt, one would be "less than
smart" to use either KPML or INFO for any interactive
voice response application.

INFO doesn't route by default. You have to *hope* your
softswitch, SBC, or other B2BUA in the way knows to relay
the INFO. At least most of those elements knows to relay
pub/sub.

Both KPML and INFO have the proxy latency penalty, making
for a piss-poor user experience.  

While we're at it, let's transport voice in SIP 

--
Sent from my wireless e-mail device. Sorry if terse.  We all
need lemonade: see <http:
//www.standardstrack.com/ietf/lemonade> for what
lemonade is.

----- Original Message -----
From: Francois Audet <audetnortel.com>
To: Hadriel Kaplan <HKaplanacmepacket.com>; Brian
Stucker <bstuckernortel.com>; Eric Burger
Cc: sip <sipietf.org>
Sent: Mon Sep 10 13:08:58 2007
Subject: RE: [Sip] INFO

Ah.... Good point. Hadn't tought of that.

In any case, I'm not sure voicemail is the best example.
Seems to me
you are more likely to use RFC 2833 for voicemail, since
it's a 
media server. Furthermore, you'll for sure be dealing with
people 
leaving voicemails that are NOT SIP users and would be going
through
a generic PSTN-SIP gateway (which would do RFC 2833).

I'd think that KPML is more useful for features that don't
terminate
media, like the Calling card example, or *gasp* invocation
of feature 
codes, and where the end-user device is known to be a SIP
phone.

> -----Original Message-----
> From: Hadriel Kaplan [mailto:HKaplanacmepacket.com] 
> Sent: Monday, September 10, 2007 12:42
> To: Audet, Francois (SC100:3055); Stucker, Brian 
> (RICH1:AR00); 'Eric Burger'
> Cc: 'sip'
> Subject: RE: [Sip] INFO
> 
> But most calls to a voicemail server DON'T actually use
DTMF, 
> I've been told
> - since most calls to a vmail server are to leave
messages.  
> Calls to retrieve voicemail do always use dtmf, but
calls to 
> leave voicemail don't.
> However calls to leave voicemail usually have the
optional 
> ability for the caller to send DTMF - for example
pressing 
> "*" and then the passcode to retrieve
voicemail, or "0" to 
> reach an attendant, or some button to cancel the
recording, 
> etc.  Only a fraction of those calls actually end up
with 
> someone pressing a dtmf button, but because you *could*
press 
> dtmf, the vmail server would have to KPML subscribe for
all calls.

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Re: INFO

Thread: Re: INFO