摘要:目前在SDH传输设备组网时候,最常用的两种组网方式就是二纤单向通道保护环和二纤双向复用段共享保护环。通道保护环往往是专用保护,在正常情况下保护信道也传主用业务,信道利用率不高。复用段共享保护环使用公用保护,正常时主用信道传主用业务,备用信道可用于传额外业务,信道利用率高。复用段共享保护环主要用于速率较高的环路。
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