Abstract
Optical circuit-switch WDM network has the characters that the transmission data length at one certain connection can be huge, while the different connects switch can be slow. So a channel with low capacity can be sued to form the control network in order to manage the WDM network. No. 7 signalling network which exists logically in public telephone network is fit for management of the WDM network. The method works practically, because both the telephone network and optical fiber exist in any place of the world. The No. 7 signalling network is high reliable one. The new technology is studied both theoretically and experimentally.
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