发明名称 HANDSET FOR HALF-DUPLEX COMMUNICATIONS THROUGH A CELLULAR TERMINAL
摘要 An accessory apparatus and an associated method are disclosed for providing half-duplex communications through a full-duplex cellular terminal. The cellular terminal outputs a speaker signal and receives a microphone input signal. The accessory apparatus includes a speaker, a microphone, and a switch. The speaker broadcasts the speaker signal from the cellular terminal to a user. The microphone generates the microphone input signal which is provided to the cellular terminal. The switch has a first operation state and a different second operation state. In the first operation state, the switch electrically connects the speaker signal from the cellular terminal to the speaker while substantially electrically isolating the microphone input signal output, which is output by the microphone, from the cellular terminal. In the second operation state, the switch electrically connects the microphone input signal from the microphone to the cellular terminal while substantially electrically isolating the speaker from the speaker signal which is output by the cellular terminal. The switch transitions between the first state and the second state in response to a user's input to provide half-duplex communications through the full-duplex cellular terminal.
申请公布号 WO9909665(A1) 申请公布日期 1999.02.25
申请号 WO1998US16838 申请日期 1998.08.12
申请人 ERICSSON INC. 发明人 PRZELOMIEC, THOMAS, ANTHONY;BLASER, ROBERT, J.;TABAIAN, SEYED
分类号 H04B1/38;H04W4/10;H04W84/08;(IPC1-7):H04B1/38;H04Q7/28 主分类号 H04B1/38
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