MGCF – Media Gateway Control Function
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MGCF – Media Gateway Control Function

The MGCF facilitates call control, interfacing the PS domain to the CS domain when interworking between the IMS and PSTN is required. From a control perspective, the MGCF has the same responsibilities as a regular telephony exchange, with the addition of protocol conversion in order to switch between SIP (Session Initiation Protocol) and ISUP (ISDN User Part) signalling. An MGCF will control one or more IMS-MGW (IMS Media Gateways) and will be used in conjunction with a BGCF (Breakout Gateway Control Function) for calls breaking out to the PSTN/PLMN.

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