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To start using Twilio in this way, you need to buy a phone number from Twilio for your callers to call.

A caller interacts with the IVR by pressing keypad numbers and speaking commands. In case you don’t know what an IVR is, it’s that thing when you call a customer service phone number and are presented with a menu system that helps you (or tries to). And I have a great example IVR that you can call yourself to explore! Twilio + Node-RED = POWER! In this project I will show you how you can build an IVR (Interactive Voice Response) system with Twilio and one of my favorite technologies, Node-RED. Like many API services, Twilio has a pay-as-you-go model, so I’ve been able to explore all this great functionality for very little money. If you like building things on the Internet, now you can integrate with those things using the phone system, whether it be via voice calls, text messages, or even wireless devices with Twilio SIM cards. It connects the mysterious, traditionally closed world of telephony with the open Internet. This project uses the Twilio Programmable Voice APIs to bridge the gap between the telephone system and the Internet. What is Twilio? Twilio is a developer platform that allows you to add capabilities like voice, video, and messaging to your applications. Twilio is fast becoming an important part of Internet’s communication infrastructure. Project source code at GitHub: node-red-contrib-twilio-ivr Node-RED Library page: node-red-contrib-twilio-ivr