What is the difference between my old telephone sets and a VoIP phone?
A. The main difference is the way telephone calls are transmitted. Traditional telephone sets transmit analog voice signals over copper wire. VoIP telephones use the SIP protocol to send voice packets over a data network, for example, the Internet. Whereas analog telephone sets are dependant on the specific copper wire(s) that lead into your home or office, a VoIP phone could be connected to practically any Internet source and be able to connect to the telephony servers.
