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对基于光同步数字传输网的ＩＰ传送技术（ＩＰ Ｏｖｅｒ ＳＤＨ）的内容和技术特点进行了较详细的介绍与说明，对相关的ＳＤＨ接口进行了讨论，并对ＩＰ ｏｖｅｒ ＡＴＭ， ＩＰ ｏｖｅｒ ＷＤＭ等传送技术进行了简要的分析和比较。
The content and technical characteristics of IP over SDH based on optical synchronous digital transmission network are introduced and explained in detail. Relevant SDH interfaces are discussed, and IP over ATM, IP over WDM, etc. are transmitted The technology was briefly analyzed and compared.