| 摘要 |
PURPOSE:To improve the convenience in operation by providing a means erasing one station's share or all of selected names and telephone numbers all together to simplify the operation. CONSTITUTION:A device to a mouthpiece of which a sound means 1 is coupled acoustically and which transmits a telephone number by a sound having a frequency corresponding to a number is provided with a means 9 storing plural pairs of names and telephone numbers combined in pairs and an erasing means 14. Further, the means 14 is operated when a key button on a keyboard 5 commanding the erasure of the names and telephone numbers stored in the means 9 is operated to erase a pair or all of the names and telephone numbers stored in a prescribed area of the means 9. |
