Re: nothing on the spec to clear dtmf buffer ?

Hi Stephane,

Actually, the way to clear dtmf is to have the caller pass through a prompt
where the bargein attribute is set false.

http://www.w3.org/TR/voicexml20/#dml4.1.5

*"When the bargein attribute is false, input is not buffered while the
prompt is playing, and any DTMF input buffered in a transition state is
deleted from the buffer (Section
4.1.8<http://www.w3.org/TR/voicexml20/#dml4.1.8>
 describes input collection during transition states)."*

Hope that helps!

~Shane

2011/10/20 Stephane Boyera <boyera@w3.org>

> Hi
> I've been trying to find a way to clear dtmf buffer before entering a form.
> The typical case is very simple:
>
> *playing a prompt with barge-in authorized
> *then having a form with a menu which plays a prompt (with still barge-in
> authorized) and capture the input
>
> what's happening is that because the first prompt is not consuming any
> dtmf, then any key pressed is passed to the second form and interrupt
> directly the second prompt and evaluate the key press.
>
> So in practice, the barge-in in the first prompt skip the second one.
>
> I've been trying to find a way to clear the dtmf buffer.
> so one (ugly) way to do that is to insert between the two part a fake form
> that consume all dtmf. that works but this is not really art programming.
> I see also that some platform added an attribute for form
> See e.g. voicegenie and cleardtmf attribute: http://developer.voicegenie.*
> *com/voicexml2tagref.php?tag=**st_form&display=standardtags<http://developer.voicegenie.com/voicexml2tagref.php?tag=st_form&display=standardtags>
>
> This does not look very standard compliant. I dind't find anything in the
> spec for that.
> Did i miss something and is there a declarative way to clear the buffer
> without going through a hack ?
>
> Cheers
> Steph
> --
> Stephane Boyera         stephane@w3.org
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