Voice-over-IP (VoIP) Networking

Voice over Internet Protocol (Voice over IP, VoIP) is one of a family of internet technologies, communication protocols, and transmission technologies for delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. The term VoIP describes the transport of voice over IP based networks. It is a generic term that covers deployments ranging in complexity from hobbyists using the internet to get free phone calls on a peer to peer basis, to full scale PSTN replacement networks. In carrier networks VoIP has been mainly deployed in enterprise networks or as a trunking technology to reduce transport costs in voice backbone networks.

However with many network operators facing eventual equipment obsolescence in their existing narrowband PSTN networks and with the drive to increase revenue by offering new and innovative multimedia services, everyone expect that end-to-end VoIP solutions will be required to replace the PSTN in the medium term.

VOIP gives solution at almost every layer of the IP network. The Internet Protocol was developed and designed for data communication. The success of the IP network has led to its adaptation to voice networking.