| 摘要 |
PURPOSE:To prevent a dialing miss and shorten the time required for dial operations, by outputting the next number with sound each time one number of the telephone number is input to the telephone set. CONSTITUTION:When one digit of a telephone number is input by the dial operation, one-digit components of register BR1 are transferred to BR2 to obtain the sound output from speaker SP. Then, when zero is input within a fixed time by the dial operation, digital data corresponding to zero is detected for agreement with contents of BR2 in J through code converting circuit E; and if the agreement signal is obtained, the next one digit of BR1 is transferred to BR2, and after that, the next input numeric value is output with sound similarly each time the telephone number is input until the value of counter C coincides with a prescribed value. |
