本文主要对比了两种以SDH传输网络承载IP业务的实现技术。文中对SDH技术进行了介绍,分别介绍了POS和EOS两种技术的实现方法并分析了各自的特点。最后,从接入方式、实现技术及带宽利用率等方面对两种技术在SDH传输网上的运用进行了比较。 This article compares two implementations of SDH transport networks that carry IP traffic. In this paper, SDH technology is introduced, and the implementation methods of POS and EOS are introduced respectively, and their respective characteristics are analyzed. Finally, the application of the two technologies in SDH transmission network is compared from the aspects of access methods, technology implementation and bandwidth utilization.