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VoIP [0] : Voice over Internet Protocol

RTP [0] : Real-time Transfer Protocol

SIP [0] : Session Initiation Protocol

H.323 [0] : is a standard that specifies the components, protocols and procedures that provide multimedia communication services : real-time audio, video, and data communications over packet networks, including Internet protocol (IP) based networks.

MGCP [0] : Media Gateway Control Protocol

CODEC [0] : COmpressor/DE-Compressor Alorithm

SOFTSWITCH [0] : carrier-class servers that control voice phone calls across circuit- and packet-switched networks

ATM [0] : Asynchronous transfer mode

FRAME RELAY [0] : A high-speed packet switching protocol used in wide area networks (WANs)