Incoming calling system

The invention the volume of incoming call system is informs user wireless portable terminal is a mobile communication unit incoming call signal reliably, wherein the non-interference people and in particular advising the probability. Therefore, for informing a user incoming call information's incoming call announcing signal transmitter (24) can be connected and a plug providing a mobile phone (21) and a microphone terminal (23) and connected; the detection method for voice; in addition, the incoming call announcing signal transmitter (24) is a mobile phone (21) and a supporting and. The mobile phone (21) to came from a base station (22) incoming call receiving the incoming call signal generation, an incoming call sound voice signal; and voice signal receiver is a microphone terminal (23) input to the incoming call announcing signal transmitter (24) method for detecting incoming call signal. The incoming call announcing signal transmitter (24) structure to generate a incoming call announcing signal (25), the transmission signal and wave's to form the incoming call announcing signal receiver (26) or the incoming call announcing signal receiver (27), and a vibration or buzzing sound informing user mobile phone (21) incoming call signal.