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0引言OTN(Optical Transport Network,光传送网)网络已被广泛应用,是未来传送网的发展方向。通常认为,OTN与传统波分复用(Wavelength Division Multiplexing,WDM)最主要的区别是增加了交叉和保护功能,使其更符合目前的综合业务承载应用。但是从目前实际情况来看,一般仅用到
0 Introduction OTN (Optical Transport Network, optical transport network) network has been widely used, is the future development of transport network. Generally, the main difference between OTN and Wavelength Division Multiplexing (WDM) is that the cross-connect and protection functions are added to make it more suitable for the current integrated service bearer application. However, from the current actual situation, generally only used