Optical wavelength multiplexing access system

According to the present invention can provide an optical transmitting and receiving apparatus using a star-type wavelength multiplex communication network can be set wavelength, without using the monitor light. In one embodiment of the present invention, an optical transmission signal transmitting and receiving light of wavelength multiplexing receiving apparatus, comprising: light receiving means for receiving may change the wavelength of the optical transmission apparatus and the transmission wavelength can be changed. The optical transmission and reception apparatus is detected by the light receiving means receiving the unused wavelengths, in which a wavelength is set to receive the light receiving means, at the same time, corresponding with the receiver in a transmission wavelength corresponding to the wavelength of the transmission wavelength of the memory table is set transmission means transmitting a light wavelength. Secondly, the wavelength of light transmitting and receiving means receives the transmission signal to the transmission wavelength of light, to set the detection response. Upon detecting the response, using the transmission wavelength and reception wavelength is set to start communication. When no response is detected, the transmission operation of the transmission signal light wavelength detector receiving wavelengths to unused repeated again.