| 摘要 |
Communication is performed without paying attention to the fact that the communication is executed between multimedia terminals having communication procedures differing from each other. A terminal 2 starts a communication procedure that is necessary to establish a communication path to a communication service unit 1 , in order to execute communication with a multimedia terminal 3 ; when a communication protocol conversion unit 7 receives communication start request from the terminal 2 , the communication service unit executes identification process of a calling terminal based on the identification number, which exists in communication start request, for determining the multimedia terminal 2 , and inquires a terminal information managing unit 9 of the calling terminal. The terminal information managing unit 9 retrieves terminal information related to the calling terminal based on a terminal information request, and informs of the retrieved terminal information to the communication protocol conversion unit 7 . The communication protocol conversion unit 7 informs of the communication start request to the terminal 3 when the transmitting the terminal information of the terminal 2 is obtained, and continues a relay process in communication procedure, which is necessary for following establishment of a communication path.
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