| 摘要 |
PROBLEM TO BE SOLVED: To easily identify a caller in a telephone system. SOLUTION: A calling signal sent from an exchange through a telephone line is detected, and when the prescribed number of the calling signals is detected, a calling side telephone number, a caller name and time sent together with the calling signal from the exchange through the telephone line are once stored in a RAM, and the caller name, the calling side telephone number and the time are also repeatedly displayed in turn each time a cursor key is depressed.
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