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Re: VoiceXML - Full Duplex ?

From: Joseph Kesselman <keshlam-nospam@-------.--->
To: NULL
Date: 2/1/2008 2:57:00 PM

VoiceXML "describes the human-machine interaction provided by voice 
response systems". It's a control file for those interactions, but does 
not actually carry any audio data within the XML file. (And it 
shouldn't; binary data is not something XML is particularly good at 
handling.)

See http://www.w3.org/TR/voicexml20 for the spec. There are some 
tutorials at http://www.voicexml.org/tutorials/intro1.html; the very 
first intro slide has a block diagram which shows that the audio is 
processed alongside the control scripts rather than through them.

VoiceXML can request that a full-duplex "bridge transfer" be 
established. But that's the only instance of "duplex" in the VoiceXML 
2.0 Recommendation.


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