VoIP (Voice over Internet Protocol) is simply the transmission of voice traffic over IP-based networks. There are three methods of connecting to a VoIP network: Using a VoIP telephone Using a "normal" telephone with a VoIP adapter Using a computer with speakers and a microphone The number one reason to switch to VoIP technology for telephone service is cost reduction. From that base, VoIP is able to provide some compelling features which makes switching even more attractive. VoIP technology can also save money on long-distance charges. VoIP has become popular largely because of the cost advantages to consumers over traditional telephone networks. VoIP calls can be placed across the Internet. Most Internet connections are charged using a flat monthly fee structure.