Regardless of the aggregation type or non-aggregation type OTU, the SDH signal R_LOS received by the client side is processed on the wavelength division side of the OTU board, and the REM_SF alarm is generated on the downstream client side.
Answer(s): A
Standard FEC, AFEC, and HFEC techniques all increase FEC overhead, and the resulting coding gain is incrementally increased.
For the aggregation type OTU board, when the ODUk_PM_AIS alarm is received on the WDM side of the receiving OTU board, the following describes the OTN standard signal processing, which is correct.
Answer(s): D
When you use the fiber synchronization mode to create a fiber, the NE does not create a fiber. The so-called "conflict fiber" does not need to be created on the NMS.
Answer(s): B
The monitoring channel did not participate in the amplification during the entire transmission, but was terminated and regenerated at each site.
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