Build a Voice Proxy With Cloud Functions

This tutorial helps users build a virtual business phone using Google Cloud Functions and Vonage APIs. The system allows users to receive calls on their virtual number while keeping their personal number private. It also enables users to make calls from their virtual number, capturing the destination number via DTMF input for connecting with a specific phone number. The system is built using two call directions: receiving a call through the virtual number and making a call from the virtual number to another phone number. The tutorial covers the prerequisites, including setting up a Google Cloud Platform account, creating a Vonage API account, and purchasing a virtual phone number. It also provides an example code snippet that demonstrates how to build the proxy-calling service using Node.js and Express.js.