ATM Switch

摘要

An ATM switch includes a plurality of stages in which each stage has basic switches and the stages are interconnected. The ATM switch includes MxN basic switches per each stage and a part for interconnecting between the stages. The MxN basic switches are divided into N groups. The part connects an output port of each basic switch at a front stage to M input ports of the basic switches at a back stage. At the output port, a wavelength-multiplexing part is used, and, at the input port, a wavelength-demultiplexing part is used. Further, a wavelength-switching part for switching optical signals of M wavelength-multiplexed optical signals arriving from the M wavelength-multiplexing part and outputting the switched wavelength-multiplexed optical signals to the M wavelength-demultiplexing part is used.