Internet Protocol, VoIP

Voice over IP is based on a number of different protocols.

Define how a call is made, the voice is be transformed that passed in the data and how these data between the appellants.

History

The origins of the VoIP h. h.323 protocol written in 1996.

At this time, Internet connections have not enough speed to carry voice calls so that describes h. 323 multimedia transmissions over local area networks (LAN). Broadband gives users make calls needed bandwidth and therefore h. 323 was adjusted. Developed VoIP protocols supported in increased number.

Features

A VoIP call mimics a regular phone call with a sequence of numbered ring reply connect.

The Session Initiation Protocol (SIP) manages this process. Combined VoIP can be called "SIP devices," a reference to the protocol used for session management. Voice is voice as a digital signal. The conversion of voice data is a program based on a protocol called a "codec".

Function

The transport of voice data over the Internet reduces costs for users and avoiding the costs the telephone companies.

Protocols used in particular the Internet - protocol transport data in packet networks on the Internet - instead of as a pulse electric analog wires.