How to organize automatic informing by phone?

Question

linux

Good afternoon. There was a need to organize automatic informing by phone.
There is a base of phone numbers, there is a text.
They assured that there is a solution on Linux, but the search was unsuccessful.
Tell me, please, in which direction to dig?
Thank you.

Answer 1

speech API, Asteriks

Answer 2

I did this for myself:
1) I connected the service "Sending SMS to e-mail and e-mail to SMS" to the necessary phones
2) I sent messages through a regular email newsletter

Answer 3

This resource helped me with their API
. Every day it gives you the opportunity to receive up to 60 messages for free to your registered number.

Answer 4

You take an asterisk, a channel from the operator - with or without a number,
small manipulations with callback or agi and ready
for little money ready to implement