| 摘要 |
PROBLEM TO BE SOLVED: To provide a server backup system which attains a mutual telephone call between terminals inside a base even when a fault occurs in an IP centrex server which provides a function of a conventional PBX etc. SOLUTION: This server backup system 1 is provided with: a means 2 for detecting the fault of the IP centrex server; and a means 3 which rewrites the destination address of a prescribed message sent from a terminal side for speaking between the terminals in the base during a fault occurrence period to the address of an opposite-side terminal from the address of its own device, and which transfers the message directly to the opposite side terminal without via the IP centrex server. COPYRIGHT: (C)2005,JPO&NCIPI
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