Free Internet Phone Service

VOIP (Voice over Internet Protocol) is a protocol optimized for the transmission of voice through the Internet or other packet switched networks. VoIP is often used abstractly to refer to the actual transmission of voice (rather than the protocol implementing it). This latter concept is also referred to as IP telephony, Internet telephony, voice over broadband, broadband telephony, and broadband phone.

VOIP (Voice over Internet Protocol)  providers may be viewed as commercial realizations of the experimental Network Voice Protocol on 1973 invented for the ARPANET providers. Some cost savings are due to utilizing a single network to carry voice and data, especially where users have underused network capacity that can carry VoIP at no additional cost. VoIP to VoIP phone calls are sometimes free, while VOIP (Voice over Internet Protocol) calls connecting to public switched telephone networks (VoIP-to-PSTN), may have a cost that is borne by the VOIP (Voice over Internet Protocol) user.