| 摘要 |
<P>PROBLEM TO BE SOLVED: To associate a plurality of telephone sets with a plurality of display devices. Ž<P>SOLUTION: A session information management table manages session information by every piece of session identification information on a voice call session. The session information includes the session identification information, telephone set identification information on the telephone sets, telephone set identification information on a partner telephone set, and information indicating the state of an applicable session. The item marked with "*" of display device identification information indicates that a display device to be used for content sharing to be executed in accordance with the voice call session is not yet selected. The display device identification information is included in the session information when the display device is selected. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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