This document describes the TGCP profile of an application programming interface (MGCI) and a corresponding protocol (MGCP) for controlling trunking gateways from external call control elements.
A trunking gateway is a network element that provides analog, emulated analog, or digital bearer and channel-associated signaling trunk circuit access to a voice-over-IP (VoIP) network.
Trunking gateways are used for interfacing to the PSTN and as such are expected to adhere to the relevant electrical, operational, and signaling standards for the trunk type they implement.