A Media Gateway Controller (MGC) is a media server (call controller) that controls telephone services on the TGM550. An Avaya media server running Avaya Communication Manager (CM) software acts as an MGC for the TGM550.
The following media servers running Avaya Communication Manager can be used with the TGM550:
You must register the TGM550 with the MGCs using which you want to control telephone services on the TGM550. For more information on registering the TGM550 with MGCs, see Registering the TGM550 with a Media Gateway Controller.