exten=>_4XXX,1,Dial(SIP/${EXTEN},20,tTr)
exten=>_4XXX,n,Answer()
exten=>_4XXX,n,Festival(La persona a la que llama no esta disponible en este momento.)
Pero el caso contrario, es decir, pasar voz a texto es más complicado y qué decir si lo buscamos gratuito (sphinx, por ejemplo) pero hay soluciones bastante buenas por ahí, y una de ellas es la que comentamos aquí: LumenVox.
Pongo la nota que han enviado por email:
Dear Asterisk Enthusiast,
Have you ever thought about adding speech recognition to your Asterisk® application?
Well now you can — and it is easier than ever to give it a try with the $50 Speech Starter Kit!
With this kit, not only do you get the full-featured LumenVox Speech Engine, but also the Asterisk Speech Interface from Digium® which gives you the ability to build dynamic speech solutions. Speech recognition technology has come of age, and is now the best way to interact with your Asterisk® system. In addition, the LumenVox Speech Engine is the only Digium-supported speech recognition software for Asterisk®.
So, go ahead, join the hundreds of developers who are already using the Asterisk Dial Plan or any of several languages, such as Java or VXML, to speech-enable their applications.
Add speech to your call router, use voice-dialing, or simply provide an easier and more natural interface to any IVR application.
Purchase the Speech Starter Kit today!
Sincerely,
The Digium and LumenVox Team
Digium.com
LumenVox.com
Por lo que tengo entendido, también está la versión spanish, pero creo que de momento solo una latin-spanish version.
Enlace: http://www.sineapps.com/news.php?rssid=1687
Ya veremos, por lo visto funciona bastante bien.