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由于光纤传输技术的不断发展，所以在传输领域中光传输已占主导地位。光传输速率已在向每秒太比特的数量级进军，其高速、宽带的传输特性，使得以电子数字程控技术为主的交换方式已很难适应，在这种情况下一种新型的交换技术──光交换便诞生了。所谓光交换是指对光纤传送的光?
As optical fiber transmission technology continues to evolve, optical transmission has dominated the transmission field. Optical transmission rates have been marching into the order of terabits per second, and its high-speed, broadband transmission features make it difficult to adapt to electronic digital programming-based switching methods, in which case a new type of switching technology- ─ ─ exchange of light was born. The so-called optical exchange refers to the optical fiber transmission of light?