Patent ID: 6771904
Filing Date: 2004-08-03
Classification: H04B

Abstract:
An optical transmission system comprising:a switching device having m input terminals each of which an input data signal is supplied to, an input terminal to which a test signal is supplied, and n (n is an integer larger than m) output terminals, for being able to generate a plurality of signals supplied to the m input terminals for the input data signals and the input terminal for the test signal to any of said n output terminals on the basis of a control signal; optical transmitters connected to the n output terminals of said switching device, respectively, for converting the signals supplied from the switching device into n optical signals having different wavelengths corresponding to n optical channels to generate them; a multiplexer for wavelength-multiplexing the plurality of optical signals generated from said n optical transmitters; an optical fiber transmission path for transmitting said wavelength-multiplexed optical signal; a transmission path characteristics determination circuit for receiving the wavelength-multiplexed optical signal from said optical fiber transmission path to determine transmission characteristics of said n optical channels; and a control unit for selecting optical channels to be operated and an optical channel not to be operated from among said n optical channels on the basis of the determination result of said transmission path characteristics determination circuit and controlling said switching device through the control signal so that said input data signals are supplied to said optical transmitters corresponding to said optical channels to be operated on the basis of the selection result.