Media gateway control protocol architecture

![Gateway Control Evolution. Current version of MGCP is informational as per RFC 3435. H.248/Megaco is standard as defined in RFC 3525. Current version of H.248 - Gateway control protocol: Version 3 is standard and in force[14]](/uploads/202501/26/Gateway_Control_Protocol_Evolution-Migration2024.png)
The media gateway control protocol architecture is a methodology of providing telecommunication services using decomposed multimedia gateways for transmitting telephone calls between an Internet Protocol network and traditional analog facilities of the public switched telephone network (PSTN). The architecture was originally defined in RFC 2805 and has been used in several prominent voice over IP (VoIP) protocol implementations, such as the Media Gateway Control Protocol (MGCP) and Megaco (H.248), both successors to the obsolete Simple Gateway Control Protocol (SGCP).