TELEPHONE SPEAKER SYSTEM BY REMOTE CONTORL

摘要

The remote controller for telephone radiates the infrared ray modulated with the pulse phase modulation method through a diode (13) . The receiver receives the infrared ray and demodulates it to provide to a microprocessor (30). connecting the subscription line to the speaker phone. The microprocessor dials the preset dial number through a tone/pulse dialler (40). When the response comes, the communicator talks with a microphone (MIC) and a speaker (59).