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Abstract-The Japanese broadband market is maturing due to expansion in the needs for richer IT lifestyles with higher bit rate access. DSL technologies have played an important role in such growth because of their lower cost and ease of deployment. In order to expand the coverage area and compete with faster services such as FTTH, the DSL family of technologies is diversifying, and there are various services on the market currently in Japan. It is very important to manage those different kinds of systems in order to minimize interference due to crosstalk. This paper describes the Japanese spectrum management standard put into effect this year.

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