| 摘要 |
PURPOSE:To listen a call tone in response to a preference of a user by providing a recording and reproducing circuit to a master set and transmitting a content in advance in the recording and reproducing circuit to a key telephone set. CONSTITUTION:The master set 2 is provided with an incoming circuit 3 detecting an incoming to a telephone line 1 and the recording and reproducing circuit 4. A recording button of the key telephone set 5 is depressed in advance and an optional voice is recorded to the circuit 4 as a call tone via a talking circuit from a transmitter 6. The optional voice is a preferred and familiar voice such as sound of a steam engine, bird song, music or human voice. When an incoming call comes to the line 1, the circuit 3 in the set 2 detects it to start the circuit 4. Since the circuit 4 reproduces and transmits the recorded content to the telephone set 5, it is outputted from a speaker 7 incorporated in the telephone set 5 and the user of the key telephone set can recognize the incoming call. |
