oIP stands for Voice over Internet Protocol, a standard technology for making and receiving phone calls over Internet data connections rather than traditional phone lines. Standard phones and enterprise PBX systems use analog signals sent over a wire, while a VoIP system translates communications into data. You can use a digital phone over traditional phone lines, but VoIP is data-centric and requires an Internet connection. To use VoIP, you need phone system devices hooked to an Internet broadband connection along with one or more IP-capable phones. Unlike traditional phones, data-based VoIP solutions can also be integrated with other types of software.