| 摘要 |
PURPOSE:To issue an outgoing call and to receive an incoming call without generating incongruity for a person who issues an individual call at every telephone set by recognizing a sub dial at every telephone set or a general call. CONSTITUTION:When the incoming call on a line 18A shows an individual incoming call and a microcomputer 6A detects an ID number for individual incoming call by a DTMF detection circuit 19A, radio data is transmitted from the microcomputer 6A to the microcomputer of a selected mobile telephone set, and an incoming call tone is sent from a tone output part to only the selected mobile telephone set, and when a response for the incoming call is received, speech with a designated telephone set can be performed. When the general call is received, the radio data is sent from the microcomputer 6A to the microcomputer of the mobile telephone set, and the incoming call tone different from that of the individual incoming call is outputted to all the telephone sets, and when a ringing telephone set responds, the speech with a responding telephone set can be performed.
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