| 摘要 |
PURPOSE:To detect a simply information such as the time difference of an opposite country at an international call by converting domestic date and time informations inputted from a timepiece device into date and time information of the opposite country and displaying the result. CONSTITUTION:The timepiece device 4 and a memory device 5 outputting the domestic data and time informations are connected to the central controller 3 of a telephone exchange 2 to which plural attendant boards 1 are connected. When an international call number is dialed from the board 1, the controller 3 reads time difference information corresponding to dial information from the memory device 5 and reads the domestic date and time informations from the timepiece device 4 to calculate the date and time information of the opposite country with addition/subtraction processing. The information is sent to an information display device via a timepiece calibration device 6, the date and time informations to be sent are used as an initial value and the display device 8 displays it while revising the value at every 1sec. Thus, the data and time of the opposite country are known simply in making an international call. |
