VOIP – Voice Over Internet Protocol
VIOP (Voice over Internet Protocol) is a protocol used for the transmitting voice through the Internet or other packet switched networks. VoIP is often used to refer to the transmission of voice . VoIP is also known as , Internet telephony, , Broadband Phone. VOIP is pronounced as voyp.
Companies providing VoIP service are commonly referred to as providers, and protocols which are used to carry voice over the network are commonly referred to as VoIP protocols. They may be viewed as commercial realizations of the experimental Network Voice Protocol implemented in 1973 for ARPANET . Cost savings is due to using a single network to carry voice and data, where users have existing un utilized network capacity that can carry VoIP at no additional cost. VoIP to VoIP phone calls are often free, while VoIP to public switched telephone networks, may have a cost that is payed by the user.
VIOP transmitt telephony signals as digital audio signal, typically reduced in data rate using speech data compression , encapsulated in a data packet stream over IP.
History of VOIP
This short section requires expansion. As the first computer networks were realized Voice over Internet Protocol has been a matter of interest. By 1973, voice was being transmitted over the Internet. The technology for transmitting voice conversations over
the Internet has been available to end-users since at least the 1990’s. In 1996, a software product called Vocaltec Internet Phone Release provided VoIP, along with extra features such as voice mail and caller identification. But it did not offer a door to the analog POTS, so it was only possible to speak to other Vocaltec net phone users. By 1997, soft switches were designed to replace a traditional hardware switching blocks by acting as the door between two telephone networks.