VoIP stands for Voice over Internet Protocol. VoIP phone service (sometimes referred to as broadband phone service or digital phone service) is a phone service that operates by using your high-speed Internet connection. There are two types of VoIP services: phone-based and computer-based. These services allow you to make phone calls using either your regular phone, an app on mobile devices, or a softphone client on a computer (via a headset with a microphone). As opposed to traditional landlines, VoIP uses your phone or computer to call the number via the Internet. The call is converted to data packets and sent over the Internet instead of through the copper wires that make up a standard PSTN network.