Wavelength division multiplexing optical transmission apparatus and communication system using the same
AssigneeNEC Corporation
InventorTatsuya Uchikata
Life of this patent
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Abstract
A wavelength division multiplexing optical transmission apparatus and a communication system employing the same are economical and highly reliable. The apparatus includes a plurality of transponders inputting and outputting branched optical signals having respective wavelengths and at least one variable wavelength transponder arranged in parallel to the plurality of transponders. Upon occurrence of failure in any one of the plurality of transponders, the optical signal having wavelength corresponding to the wavelength of the optical signal to be transmitted from the faulty transponder is transmitted from the variable wavelength transponder.
Claims16
A wavelength division multiplexing optical transmission apparatus for reproduction relaying of a wavelength division multiplexed optical signal, comprising:
- a plurality of transponders inputting and outputting demultiplexed optical signals having respective wavelengths;
- at least one variable wavelength transponder arranged in parallel to said plurality of transponders,
- on occurring failure in any one of said plurality of transponders, said variable wavelength transponder outputs an optical signal having the wavelength corresponding to the wavelength of the optical signal which should be output from the faulty transponder.
Dependencies are inferred from the claim text.