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SDH光通信中保护方式1+1和1+0的区别，复用段1+1保护，一般是用在链状系统，两块群路板走不通的光缆路由，发端双发，收端选收。属热备份，不用执行倒换协议，倒换速度非常快，只有几个毫秒。1+0就是木有保护，只有一块工作板，工作板或线路断掉了，业务也就断掉了。简单来…
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