In your terminal navigate to the project directory and execute the following command:
bundle exec ruby server.rb
This will start the application on
http://localhost:4567. Making a web request to that URL will initiate a new call. You can do so by either opening up your preferred web browser and visiting that link or sending a cURL request by running
curl http://localhost:4567 from your terminal.
Play Audio into a Call with RubyA tutorial showing you how to build an app that will play audio into a PSTN call