> -----Original Message-----
> From: Hadriel Kaplan [mailto:HKaplan acmepacket.com]
> 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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