| http://www.w3.org/ns/prov#value | - To handle such a next generation digital transmission apparatus for subscribers (NGDLC), if the active/protection switching mechanism in the conventional digital transmission apparatus for subscribers (DLC) is used as is, the construction of the apparatus is conspicuously enlarged, and therefore there is a problem in that the demand that the remote terminal (RT) should be made as compact as possib
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