Importance

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Abstract

An optical network unit registration method registers an unregistered optical network unit in a network that includes an optical line terminal having a plurality of optical subscriber units that allocate different wavelengths from one another, and a plurality of optical network units including a variable wavelength filter and configured to connect to the optical line terminal via one or more optical transmission paths. The optical network unit registration method includes a transmitting a wavelength notification signal that indicates a wavelength for the variable wavelength filter to one or more optical network units, a setting a transmission wavelength for the variable wavelength filter based on the wavelength that wavelength notification signal indicates, and a registering an unregistered optical network unit that receives the wavelength notification signal.

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First Claim