Method of facilitating tallgroup calls in a peer communication network

In a communications network that includes a plurality of peer-to-peer communication system networks, wherein each communication system network includes a system controller, a method of facilitating a talkgroup call throughout the communications network, the method comprising the steps of:

• at a first communication unit of a plurality of communication units that are members of at least a first talkgroup, sending a request for a call involving members of the first talkgroup to a first system controller at a first communication system network;
• at the first system controller,
• receiving the request from the first communication unit;
• identifying a second communication system network containing members of the first talkgroup;
• and
• selectively sending a talkgroup call command to the second communication system network, thereby facilitating the talkgroup call throughout the communications network.

In a communications network that includes a plurality of peer-to-peer communication system networks, wherein each communication system network includes a system controller, a method of facilitating a talkgroup call throughout the communications network, the method comprising the steps of:

• at a first communication unit of a plurality of communication units that are members of at least a first talkgroup, sending a request for a call involving members of the first talkgroup to a first system controller at a first communication system network;
• at the first system controller,
• receiving the request from the first communication unit;
• retrieving the first talkgroup record from a first database;
• determining whether an identifier of a second communication system network is present in the first talkgroup record;
• and
• when the second communication system network is present in the first talkgroup record, selectively sending a talkgroup call command to the second communication system network, thereby facilitating the talkgroup call throughout the communications network.