US Patent 7782875 Megaco protocol with group termination

Megaco is a device control protocol defining a general framework for physically decomposed media gateway, where the intelligence of the gateway is in a master node called the media gateway controller, and the actual switching and media transfer is performed in one or more slave nodes called the media gateway(s). In order to enable transfer of group-related information from the media gateway controller to the media gateway, a group termination for the group-related information is created in the media gateway. The group termination is non-member-specific and associated with the group, and the media streams to the group are directed to the group termination.