摘要
本文介绍了4种不同类型光纤自愈环路:二纤单向通道保护环、二纤双向通道保护环、四纤复用段共用保护环和二纤复用段共用保护环,并指出不同类型的环路适用于不同的应用场所(如接入网、中继网和长途网等),分析了选择保护环时需要考虑的各种因素。
This paper introduces four kinds of SDH self-healing rings 2 -fiber unidirectional path protec- tion ring,2-fiber bidirectional path protection ring,4-fiber mul- tiplex section shared protection ring and 2-fiber multiplex section shared protection ring,points out that various factors should be considered in choosing a suitable self-healing ring while applied in a certain situation.
关键词
环形网
通道保护环
SDH
通信网
ring network
path protection ring
shared protection ring
