Media Gateway Control Protocol (MGCP)The Media Gateway Control Protocol, or MGCP, was designed to address the requirements of production IP telephony networks that are built using "decomposed" VoIP gateways. MGCP-based VoIP solutions separate call control (signaling) intelligence and media handling. MGCP functions as an internal protocol between the separate components of a decomposed MGCP-compliant VoIP gateway. More specifically, MGCP is a protocol used by external call control elements called Media Gateway Controllers (MGCs) for controlling Media Gateways (MGs). Decomposed MGCP-compliant VoIP gateways appear to the outside as a single VoIP gateway.
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