| 摘要 |
A crossconnect unit, comprising: a unit for inputting a plurality of coherent signals having a sub-signal added to a main signal (24) after said sub-signal has been modulated by one of a group of modulation methods including a frequency modulation, a phase modulation, an intensity modulation and an amplitude modulation which are different from those applied to said main signal; a wavelength filter (1) for extracting a desired signal from said plurality of coherent signals; a destination decoder (3) for detecting said sub-signal from said extracted signal and extracting destination information (22); and means (4) for setting a signal path for said extracted signal based on said destination information. <IMAGE> |
