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Understanding the MGCP ALG

The Media Gateway Control Protocol (MGCP) is a text-based Application Layer protocol used for call setup and call control between the media gateway and the media gateway controller (MGC).

Before You Begin

For background information, read

The protocol is based on a master/slave call control architecture: the media gateway controller (call agent) maintains call control intelligence, and media gateways carry out the instructions from the call agent. Both signaling packets and media packets are transmitted over UDP. JUNOS software supports MGCP in route mode and Network Address Translation (NAT) mode.

The MGCP ALG performs the following procedures:

This topic covers:


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