COMMUNICATION CONTROL DEVICE AND METHOD THEREFOR, COMMUNICATION DEVICE, COMMUNICATION SYSTEM AND METHOD THEREFOR, AND PROVIDING MEDIA THEREFOR

摘要

A communication control device having a server device and capable of simplifying procedures and operations required for participating in party communication, wherein, when a server device (103) receives via a communication line information designating terminal devices (1052-1054) along with a request POR requesting the participation of the designated terminal device in the inter-multi-site communication, it sends an inquiry PAI about whether or not the terminal device intends to participate in the inter-multi-site communication to the designated terminal device via a communication line, and, when an answer PAA informing the participation in the inter-multi-site communication is received from the designated terminal device via a communication line, controls inter-multi-site communication among a plurality of terminal devices including the designated terminal device.