| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To monitor speech communication at arbitrary timing by multicast distributing voice/video data of an IP telephone. <P>SOLUTION: A communication control device 100 includes a connection control part 102 for controlling connection of at least two IP telephones connected through a network, and a multicast address setting part 104 for allocating an arbitrary multicast address each time speech communication is generated. The connection control part 102, when one IP telephone performs transmission to another IP telephone, notifies the another IP telephone of a multicast address allocated by a multicast address setting part, and on receiving a response from the another IP telephone, notifies the one IP telephone of the multicast address allocated by the multicast address setting part. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
