play_audio_over_phone_line

This python script will play an audio file over phone line using Raspberry Pi 3

Detais at - https://iotbytes.wordpress.com/play-audio-file-on-phone-line-with-raspberry-pi/

play_audio_dial_out_remote_control

This python script will play an audio file over the phone line while accepting DTMF input to control the fetch of a remote URL. This python script will dial out once a day and play an audio file over the phone line.