Importance

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Abstract

A synchronous communication device for processing communication synchronously among a plurality of information terminals connected to a communication line, comprising: judging means for judging whether or not the plurality of information terminals connected to the communication line are in a normal communication state; input information setting means for, when on the basis of the result from the judging means judgment is made that an anomaly has occurred in at least one information terminal among the plurality of terminals and that synchronization of the one information terminal with another information terminal among the plurality of terminals is not possible, setting as assumed input information the input information of the synchronization immediately prior to the synchronization in which synchronization is not possible; and computing means for, on the basis of the assumed input information set by the input information setting means, determining the synchronization state of the synchronization in which synchronization is not possible, by executing a predetermined computing process; wherein each process is repeated until the judging means judges that synchronization with the other information terminal among the plurality of information terminals becomes possible through recovery of the communication state of the information terminal in which the anomaly has occurred.

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First Claim