arduino-gsm-call-from-mobile

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hello,

i want initiate call normal mobile "arduino" gsm. below activities should happen.
(a). call mobile should reach "arduino" gsm.
(b). gsm should able interpret caller (voice stream text).
(c). gsm should able send response caller voice stream.

i have seen sample "c" code receive voice calls ->they read serial port character bytes. how possible? mobile how voice information transmitted , how gsm able
information character bytes? internally there voice text conversion taking place? or need setup voip server (i not clear on this)? or sim provider take care of this?

kindly help.

thanks

gsm, , digital cellular technologies, send digitized voice, arriving "speech" string of digits (actually goes wireline phones long-haul links).  gsm card, whatever may be, convert digital stream analog voice, there no way arduino sibling task of voice-to-text recognition.    voice-to-text available everywhere look.  in case, guess want find chip that  that.  don't know if such exist, that's google for.


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