Subject: Re: [Sip] INFO

From: "Eric Burger" <[email-masked]>
Date: Mon, 10 Sep 2007 13:56:37 -0700

+1

--
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 <[email-masked]>
To: Hadriel Kaplan <[email-masked]>; Brian Stucker <[email-masked]>; Eric Burger
Cc: sip <[email-masked]>
Sent: Mon Sep 10 13:50:41 2007
Subject: RE: [Sip] INFO

> -----Original Message-----
> From: Hadriel Kaplan [mailto:[email-masked]] 
> Sent: Monday, September 10, 2007 13:31
> To: Audet, Francois (SC100:3055); Stucker, Brian 
> (RICH1:AR00); 'Eric Burger'
> Cc: 'sip'
> Subject: RE: [Sip] INFO
> 
> Ya, voicemail isn't the strongest - I noted in that email 
> that a VM would probably (hopefully) do 2833.  But there are 
> plenty of PSTN gateways which don't do 2833.  In fact I've 
> heard that's where the INFO usage for dtmf got born.  There 
> are also plenty of Enterprise hard-phones that apparently 
> don't do 2833.  Nor do most H.323 devices.  Considering how 
> much INFO-dtmf is demanded and used, I assume it must be a 
> large set of devices or apps that don't do 2833.

My expectation is that most systems have (or will soon) support
RFC 2833, and be migrating to it soon.

INFO worked relatively well in a single-vendor network, but it really
was pretty useless when trying to interoperate with other vendors.

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