Patent 7797011 was granted and assigned to Panasonic on September, 2010 by the United States Patent and Trademark Office.
The present invention aims at permitting users of the equipments to exchange mutually their own wills easily in a PoC service not to take a floor. In a PoC service that attains a half duplex talk session using a packet communication between the plurality of equipments via a PoC server, a PoC server 20 for controlling a communication relay among a plurality of equipments includes a managing unit 20a for managing the user equipments connected to the PoC server 20, an acquiring unit 20b for acquiring a key operation of each equipment as operation information, and a transmitting unit 20c for transmitting the acquired operation information to the equipments that the managing unit 20a manages.