摘要
当SDH系统产生不可用秒(UAS)告警且对业务造成影响时,SDH系统却没有发生复用段倒换,没有起到保护业务作用。为此,从SDH复用段保护环倒换机制和倒换条件,SDH系统误码性能检测方法,以及ITU-T误码门限定义等方面进行分析,寻找SDH系统没有正常倒换的原因,并提出改进方案。
When a SDH system giving off an unavailable seconds alarm that affects the services,the SDH multiplex section switching system fails to switch over to protect the services.In order to find out the cause of switching-over failure of SDH system,SDH multiplex section protection ring switch-over mechanism and switch-over conditions,SDH test method of system error,and ITU-T error limit are analyzed systematically and improvement suggestions are presented.
出处
《铁道通信信号》
2012年第2期58-60,共3页
Railway Signalling & Communication
关键词
系统
误码
门限
System
Bit error
Threshold
