Summary

This Recommendation describes an IPCablecom profile of an Application Programming Interface (API) called a Media Gateway Control Interface (MGCI) and a corresponding protocol (MGCP) for controlling voice-over-IP (VoIP) PSTN gateways from external call control elements. This is one of the two profiles referenced in ITU-T Rec. J.171.0. The second profile is specified in ITU-T Rec. J.171.2.

The MGCP assumes a call control architecture where the call control "intelligence" is outside the gateways and handled by external call control elements. The IPCablecom profile as described in this Recommendation will be referred to as the IPCablecom Trunking Gateway Control Protocol (TGCP).