| 摘要 |
PURPOSE:To reduce the line trouble of a transaction data communication by communicating dummy data before the communication of transaction data is executed and executing the re-communication after a telephone call is executed again when the communication of the dummy data is not normally completed. CONSTITUTION:An automated teller machine (terminal) 1 dials to a center 4, next, the text (TEXT) 3 of a dummy enquiry is transmitted, a TEXT 4 of the dummy response from the center 4 is received, when the communication of the dummy data is normally completed, the TEXT 1 of the transaction enquiry is transmitted and the TEXT 2 of the transaction response from the center 4 is received. Next, when the communication of the transaction data is normally completed, the communication completion is achieved, and when the communication is not completed, the abnormality is obtained. When the communication of the dummy data is not normally completed, the line is turned off, and when retrying is not yet executed, dialing is executed again, and when the retrying is already executed, the abnormality is obtained. |
