Re: [AVT] DTMF interoperability: In-band, RFC 2833 or SIP INFO

[Peter Saint-Andre <stpeter at jabber.org>]

On Wed, Jun 20, 2007 at 11:45:12AM +0300, Murat Artun wrote:

> I want to ask about the interoperability issues for DTMF sending.
> 
> There exist three ways for DTMF sending: In-band (I use this term
> meaning in audio as a voice data), RFC 2833 (currently 4733 obsoletes,
> but no change to previous procedure exists) and SIP INFO.

FWIW, in Jingle we use an XML format for DTMF information:

http://www.xmpp.org/extensions/xep-0181.html

However, use of RFC 2833 (RFC 4733) can be negotiated.

The XML format should be interoperable (through a gateway or other
transformational agent) with the SIP INFO method. We'll document that
when we write the forthcoming specification on SIP-Jingle interworking.

Peter

-- 
Peter Saint-Andre
XMPP Standards Foundation
http://www.xmpp.org/xsf/people/stpeter.shtml


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