Media gateway controller

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A media gateway controller ( MGC ) is a system that is used in certain IP telephony networks. An MGC controls a number of media gateways or media servers. The MGC receives signaling information (such as dialing digits) from the media gateway and is used as an intelligent entity in IP telephony for call control. There are several protocols used between an MGC and a media gateway such as: B. the Media Gateway Control Protocol (MGCP) and Megaco .

The Media Gateway Controller (MGC) often also functions as a call agent and is therefore the core component of a soft switch . In it, the signaling of the Session Initiation Protocol (SIP) of the IP world is converted into a D-channel signaling for ISDN .

The control protocols

  • The Media Gateway Control Protocol (MGCP) is a standard protocol for handling signaling and session management during a multimedia conference. The protocol defines a means of communication between a media gateway, which performs the necessary data conversion into a format for a circuit-switched network (as in a packet-switched network) and the media gateway controller.
  • The Session Initiation Protocol (SIP) is a network protocol for establishing, controlling and terminating a communication session between two or more participants . The protocol will u. a. specified in RFC 3261 . SIP is a frequently used protocol in IP telephony.
  • The H.323 protocol is a protocol from the H.32X series that also includes communication via public telephone networks and ISDN. However, this is used less and less.

More functions

If the media gateway is used to convert voice from the TDM network to an IP network, the functionality of a signaling gateway is also required, since the establishment of a connection in the traditional TDM network is always preceded by the sending of signaling data and this only depends on the functionality of the signaling gateway can be interpreted.

Individual evidence

  1. ↑ Media Gateway Controller (MGC) - definition audiocodes.com - accessed on February 26, 2013
  2. ^ Media Gateway Control Protocol (MGCP) searchnetworking.com - accessed February 26, 2013