| 摘要 |
PURPOSE: A terminal-to-terminal communication connection control method using an IP(Internet Protocol) transfer network is provided to set an address administration table to a network node apparatus of the IP transfer network, and to register addresses of terminals into the address administration table is employed, so as to realize an IP packet communication by a multicast manner with improving information security performance. CONSTITUTION: A call setting IP packet is transmitted from a media router(1-3) to a connection server(1-5). The connection server(1-5) produces an IAM(Initial Address Message) containing a line number. The IAM is transmitted to a connection server(1-6) via a relay connection server(1-7). The connection server(1-6) transmits a call setting IP packet to a media router(1-4), and the media router(1-4) transmits the call setting IP packet to a terminal(1-2). The connection server(1-6) produces an ACM(Address Completion Message) and transmits the ACM to the connection server(1-5). When a report of telephone calling operation is received from the terminal(1-2), the connection server(1-6) produces a CPG(Call Pass Message). The CPG reaches to the connection server(1-5). The connection server(1-5) transmits the report of telephone calling operation of the terminal(1-2) to the media router(1-3). Upon receipt of a response issued from the terminal(1-2), the connection server(1-6) produces an ANM(Answering Message). The ANM reaches to the connection server(1-5). The connection server(1-5) stops the calling sound of the terminal(1-2). Both of the terminals(1-1,1-2) establish an inter-terminal communication to transmit/receive the digital media. A request for interrupting the inter-terminal communication is transmitted from a media router(1-3). A release request is sent from the connection servers(1-5) to both the relay connection server(1-7) and the connection server(1-6). An interrupt instruction is transmitted from the connection server(1-6) to the media router(1-4), and on the other hand, a release completion is transmitted to the server(1-6). And an interrupt completion is sent to the media router(1-4) so as to connect/release the inter-terminal communication between the two terminals(1-1,1-2).
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