VoIP is, or Voice over Internet Protocol, a new form of digital telephone service in which calls are sent and received over the Internet. To utilize Voice over IP phVoIP is, or Voice over Internet Protocol, a new form of digital telephone service in which calls are sent and received over the Internet. To utilize Voice over IP phone systems, all users need is a high speed Internet connection and a VoIP phone service provider.one systems, all users need is a high speed Internet connection and a VoIP phone service provider.