Which of the following is the main function of the transport layer in the Huawei ECC protocol stack?

In order to meet the specified synchronization quality requirements, corresponding requirements must be made on the network for synchronous transmission, and the specified networking rules must be followed during network planning. Which of the following is wrong?

OOS overhead is non-associated overhead. Which of the following descriptions about OOS overhead is wrong?

Which of the following belongs to the optical layer part of the OTN frame structure? (Multiple choice)

The alarm detection of the optical layer overhead is realized through the optical layer overhead OOS. Although the alarms such as R_LOS and MUT_Los are also optical layer alarms, they are not based on OOS detection and reporting, but based on optical power detection and reporting.