Patent ID: 7359645

Claim:
A dispersion compensating method for use in an optical transmission system which compensates for a real dispersion quantity attributable to wavelength-multiplexed light and transmits the wavelength-multiplexed light, the method comprising: measuring, in a plurality of optical transmission devices which are provided in said optical transmission system and transmit said wavelength-multiplexed light, for measuring said real dispersion quantity; computing, in a control section provided in said optical transmission system, for computing compensation quantities of respective transmission spans on the basis of said real dispersion quantities measured in said measuring and design dispersion quantities of said respective dispersion spans; compensation quantity notifying, in said control section, for notifying said compensation quantities computed, in said computing to said plurality of optical transmission devices; and compensation quantity setting compensating, in said plurality of optical transmission devices, for compensating for said dispersion quantity on the basis of the compensation quantities notified in said compensation quantity notifying.