Megaco (a contraction of "Media Gateway Controller") is a signalling protocol, used between a Media Gateway and a Media Gateway Controller (also known as a Call Agent or a Soft Switch) in a VoIP network. It defines the necessary signalling mechanism to allow a Media Gateway Controller (Call agent) to control gateways in order to support voice/fax calls between PSTN-IP or IP-IP networks. List of signaling protocols: QSIG, H.225. ... IP Telephony, also called Internet telephony, is the technology that makes it possible to have a telephone conversation over the Internet or a dedicated Internet Protocol (IP) network instead of dedicated voice transmission lines. ...

The protocol is defined by IETF RFC 3525 and was the result of joint work of IETF and ITU. It is also known as H.248. H.248 is the name given to it by the ITU, Megaco is the IETF name. The Internet Engineering Task Force (IETF) is charged with developing and promoting Internet standards. ... Monument in Bern, Switzerland. ... Megaco (a contraction of Media Gateway Controller) is a signalling protocol, used between a Media Gateway and a Media Gateway Controller (also known as a Call Agent or a Soft Switch) in a VOIP network. ...

See also

• H.248 Information Site This site provides information related to H.248, including pointers to standards and draft specifications
• Session Initiation Protocol (SIP)
• H.323
• Media Gateway Control Protocol, a more adopted protocol.

Example : Avaya G700 Media Gateway Uses this Protocol Session Initiation Protocol (SIP) is a protocol developed by IETF MMUSIC Working Group and proposed standard for initiating, modifying, and terminating an interactive user session that involves multimedia elements such as video, voice, instant messaging, online games, and virtual reality. ... H.323 is an umbrella recommendation from the ITU-T, that defines the protocols to provide audio-visual communication sessions on any packet network. ... In computing, Media Gateway Control Protocol (MGCP) is an internal protocol used within a distributed Voice over IP system that can appear to the outside world as a single VoIP gateway. ...