| 摘要 |
PURPOSE:To make a callee side know a person whom a caller wants to call before calling by providing a means for recognizing the OPposite person the caller wants to call before generating a ringing tone. CONSTITUTION:A titled telephone set provides a speech network 8 for converting two-wire-four-wire, a telephone receiver 9, a voice recording and reproducing control circuit 10, a storage element 11 for storing a digitized voice signal and a parallel I/O 12 for deciding the existence of a call signal, controlling the voice recording and reproducing control circuit 10 and detecting a DTMF, etc. Various kinds of faulse bEll sounds corresponding to the detected DTMF are generated in a faulse bell sound generation circuit 19 and made to pass through an amplifier 16 so as to be emitted from a speaker 17. Who is called is decided according to the difference of timbre of the faulse bell sound. Thus the callee side is released from a job of answering a bell instead of the callee and the caller side can make it needless to ask to call the callee since the person whom the caller wants to speak answers a telephone.
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