The ADM also provides for dynamic bandwidth allocation, optical hubbing, and ring protection.
ADM还用于动态带宽分配、光学压制阴模法以及环保护。
英语百科
Ring protection
In a telecommunication network, a ring network affords fault tolerance to the network because there are two paths between any two nodes on the network. Ring protection is the system used to assure communication continues in the event of failure of one of the paths. There are two widely used protection architectures: 1+1 protection and 1:1 protection.