How to Handle Handset Input (DTMF) From a Phone Call in ASP.NET Core

This tutorial teaches developers how to set up an Interactive Voice Response (IVR) system using Vonage's Voice API and ASP.NET Core applications, with a focus on collecting Dual-Tone Multi-Frequency (DTMF) input from users over Public Switched Telephone Network (PSTN) calls. The process involves setting up a Vonage API account, creating a Vonage application, installing the Vonage SDK in an ASP.NET Core project, and configuring the app to receive DTMF input from users. The tutorial provides step-by-step instructions and code examples for building the IVR system, including handling incoming calls, processing user input, and sending responses back to the caller. Once set up, developers can test their application by dialing into their Vonage number and interacting with it using a handset or other DTMF-enabled device.