asterisk users - Apr 2007 - Voicemail: How to send a notification if Caller hags up during announcement

Hi,

I was wondering if there was a way in Asterisk (agi script, asterisk-itself,
whatever ... ) to send a notification to the user (Mail, SMS like voicemail
application is doing) if the user has called, but did not leave any messages?

I tried to use the "minmessage", but, couldn't. Is that the way ?
I was thinking of using the "h" Dialplan, and launch some script, but
then,
how to know if caller has left a message or not ?
I wouldn't like to send 2 messages to the user.

Thanks for your help !

Jean-Marc
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