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Voice over IP Fundamentals, Second Edition by Sudipto Mukherjee, Satish Kalidindi, Manoj Bhatia, James Peters, Jonathan Davidson

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Chapter 13. Gateway Control Protocols

This chapter covers two Internet Engineering Task Force (IETF) gateway control protocols that control Voice over IP (VoIP) gateways from external call-control elements: Media Gateway Control Protocol (MGCP) and H.248/MEGACO. These gateway control protocols are designed to support VoIP architecture, where the media functions are separated from call-signaling functions. Therefore, their use is prevalent in large trunking gateways and residential gateways. MGCP is widely deployed and is the focus of this chapter. H.248/MEGACO is another contending protocol, and it is briefly explained at the end of this chapter. MEGACO stands for media gateway control, but do not confuse it with MGCP.

MGCP Overview

MGCP is a protocol ...

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