VoIP is a method of sending call data over the internet, rather than through a landline telephone network or satellite. With the widespread availability of internet connectivity, VoIP has become increasingly common in office settings and its market size is forecast to reach $102.5 billion globally by 2026. To make VoIP calls, you don't necessarily need extensive hardware requirements, but some equipment is necessary. A modem and router are essential for connecting devices to the internet and enabling communication with other devices. Optional equipment includes a VoIP gateway, which converts analog signals into digital data packets, allowing for versatile communication between the internet and traditional landline systems. Additionally, VoIP desktop phones and headsets can be used to enhance the user experience and provide features like caller identification and hands-free calling. With the help of Twilio's Programmable Voice API, companies can establish a reliable and scalable VoIP platform to meet their needs.