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近年来,网络技术的快速发展,给通信业带来了巨大的变革。网络技术的革新已从最初的物理技术经历了三个阶段:第一个阶段为基于铜线和微波无线技术的网络;第二个阶段利用光纤传输技术的优点,比如激光二极管和光学元件的速度以及光的低损耗;第三代即全光网络,它充分利用光纤的重要特性——巨大的带宽:采用波分(WDM)、时分(TDM)或码分多址(CDMA)技术来开发利用这一巨大的带宽。
In recent years, the rapid development of network technology has brought tremendous changes to the communications industry. The evolution of network technology has gone through three phases from the original physical technology: the first is a network based on copper wire and microwave radio technology; the second phase takes advantage of the advantages of optical fiber transmission technology, such as the speed of laser diodes and optics And low loss of light. The third generation, the all-optical network, takes full advantage of the important features of optical fibers - huge bandwidth: developed using WDM, TDM or CDMA technologies This huge bandwidth.