Media Gateway Control Protocol (MGCP)
The Media Gateway Control Protocol (MGCP) is an implementation of the Media Gateway Control Protocol architecture for controlling media gateways on Internet Protocol (IP) networks connected to the public switched telephone network (PSTN). The general architecture and programming interface is described in RFC 2805 and the current specific MGCP definition is RFC 3435 which obsoleted RFC 2705. It is a successor to the Simple Gateway Control Protocol (SGCP) which was developed by Bellcore and Cisco. In November 1998, the Simple Gateway Control Protocol (SGCP) was combined with Level 3 Communications Internet Protocol Device Control (IPDC) to form the Media Gateway Control Protocol (MGCP).
MGCP is a signalling and call control communications protocol used in Voice over IP (VoIP) systems that typically inter-operate with the public switched telephone network (PSTN). As such it implements a PSTN-over-IP model with the power of the network residing in a call control center softswitch which is similar to the central office of the PSTN. The endpoints are low-intelligence devices, mostly executing control commands. The protocol represents a decomposition of other VoIP models, such as H.323, in which the media gateways, e.g., H.323's gatekeeper, have higher levels of signalling intelligence.
MGCP uses the Session Description Protocol (SDP) for specifying and negotiating the media streams to be transmitted in a call session and the Real-time Transport Protocol (RTP) for framing of the media streams.
Read more about Media Gateway Control Protocol (MGCP): Architecture, Protocol Overview, RFCs, Megaco, See Also
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