ФІО = DTMF

 Запитання:https://www.activexperts.com/serial-port-component/at/dtmf/

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http://codius.ru/articles/GSM_модуль_SIM800L_часть_4


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https://www.reddit.com/r/AskProgramming/comments/97zrnd/trying_to_send_audio_using_a_gsm_modem_in_a_voice/


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 ANSWER ====================================

https://circuitdigest.com/microcontroller-projects/automatic-call-answering-machine-using-arduino


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