| 摘要 |
PURPOSE:To confirm a registration number at low cost even for an eyesight handicapped person by reading a registered telephone number from a memory and intermitting an audible frequency signal by a Morse code so as to display acoustically the telephone number. CONSTITUTION:In confirming the registered telephone number stored in a memory 17, an abbreviated dial of a key 16 is operated. the storage information read from the address of the memory 17 corresponding to the operation is inputted to a decoder 18. The decoder 18 applies Mores coding to the numerals of the number corresponding to the abbreviated dial, the result is inputted in parallel with a shift register 19 and outputted from the register 19 as a serial data, delayed 20 and inputted to one input of an AND circuit 21. The audible frequency of a reference frequency generator 22 is inputted to the other input of the AND circuit 21 through the control of a control circuit 25. The output of the AND circuit 21 is amplified (23) and an intermittent audible frequency is outputted from a speaker 24. Thus, even an eyesight handicapped person confirms the registered number with low cost. |
