| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a SIP (Session Initiation Protocol) telephone system in which immediate responsiveness is improved. Ž<P>SOLUTION: A SIP terminal 11 transmits a SUBSCRIBE to an exchange server 20, for example, on starting of the SIP terminal 11. The SUBSCRIBE is not intended to monitor any object and does not describe an event package, or the like. When the exchange server 20 receives such a SUBSCRIBE, the exchange server 20 thereafter transmits data for the SIP terminal 11 by a NOTIFY. These data may be data that are not directly related to presence management, such as capturing line key information. The SIP terminal 11 also transmits the data to the exchange server 20 by using a PUBLISH. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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