Receive Voice Call Events for a Call In Progress with Ruby on Rails

This tutorial continues the series of "Getting Started with Nexmo APIs and Ruby on Rails" by focusing on how to listen for call events from Nexmo to update the status of a call in a Rails application. To follow this tutorial, developers need a basic understanding of Ruby and Rails, as well as a Vonage API account and a working Rails server. The tutorial explains how to set up a webhook endpoint with Nexmo, handle incoming call events, and process the received webhooks to update the status of the calls in the application.