| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To intercept communication with a communication terminal having no functions of generating and transmitting data for interception different from data for communication without providing the communication terminal with the functions. <P>SOLUTION: An SIP (Session Initiation Protocol) server 30 is a communication control unit which controls transmission and reception of data between mobile phones 10 and 20, and includes a request reception unit 34 which receives a request to start communication interception from a communication interception device 50, a switching transmission unit 35 which transmits a switching request to transmit and receive data via the communication interception device 50 to the mobile phones 10 and 20 respectively when the start request is received, and an information transmission unit 36 which transmits session information for connecting communication between the mobile phones 10 and 20 when the start request is received so that the communication interception device 50 relays and intercepts the communication, based upon the session information, between the mobile phones 10 and 20 having received the switching request. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
