中文摘要：

自愈环因其具有自动故障恢复、高可靠性、组网灵活、实现简单等特点,使其成为SDH网络最常用的组网方案,从而在电信传输网中获得了广泛的应用.从理论和应用设计两个角度,阐述了自愈环的工作原理,论证了自愈环在实际组网应用的必要性和重要性.在现有实验室的条件下,设计出一个常用通道保护自愈环.

英文摘要：

Because self-healing ring has very good qualities such as automatic fault recovery, high reliability, flexible networking and easy to implement, it becomes the most commonly networking scheme in SDH network. From the working principle and design of the self-healing ring, we demonstrate the necessity and importance of self-healing ring in the actual networking application. Finally, under the condition of our laboratory, we design a common used self-healing ring.