| 摘要 |
PURPOSE:To improve the work efficiency by eliminating a need to invalidate communication data at the time of the occurrence of communication line trouble and continuing the work and the processing without waiting for restoration of a communication line. CONSTITUTION:A communication monitor means 1 always monitors the communication line state and transfers its information to a communication control means at the time of the occurrence of the restoration of communication line trouble. The communication control means 2 writes communication data in an external storage device 4 by information from the communication monitor means 1 in the case of the occurrence of communication line trouble and successively transfers communication data preserved in the external storage device 4 to the means 2 to delete this communication data from the external storage device 4 by information from the communication monitor means 1 in the case of the restoration of communication line trouble. A communication means 3 transmits communication data received from the communication control means 2 to a host computer 5. |
