OTN needs to change the original single-wave pass-through from D40 to M40 to use NQ2 as a relay. The error described below is

• A.It can be relayed in cross mode, and cross board needs to be configured at this time
• B.For optical layer ASON and electrical layer ASON applications, setting "optical relay mode" and "electrical relay mode" has no effect on the system
• C.When the NQ2 adopts the relay board mode, the ASON is not turned on. For the end-to-end path, the electrical relay mode is required
• D.When you do not need to relay in cross mode, at this time, the NQ2 fiber connection (take 1 optical port as an example) is the westward direction of IN1 port and the eastward direction of OUT1 port.

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What kind of alarm will be inserted into the opposite NS3 board when the optical port software is looped back on the NS3?

• A.OTU3_LOF
• B.ODU3_PM_SSF
• C.ODU3_PM_AIS
• D.ODU3_PM_OCI

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OAU gain is continuously adjustable, and the noise figure (NF) is different under different gain conditions, generally the larger the gain, the smaller the noise figure

• A.FALSE
• B.TRUE

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What is wrong with the workflow of U2000 CORBA and OSS interconnection?

• A.CORBA registers CORBA in the notification service to create a channel to the name service
• B.OSS accesses CORBA agent through CORBA client CORBA agent reports messages to OSS through event channel
• C.start name service start notification service start U2000 CORBA
• D.OSS connects to the name service through the CORBA client. The CORBA client of OSS finds the event channel through the name service

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The following statements about the main and backup channels of optical line protection are wrong:

• A."Initial difference between the main and backup channels (dB)"-used to set the reference value of the optical power difference between the main and backup channels of the board.
• B.If the current optical power difference between the main and backup channels exceeds the "main and backup channel difference threshold (dB)", the system will undergo protection switching.
• C."Main and standby channel difference threshold (dB)" One is used to set the signal failure (SF) when the difference in optical power between the main and standby optical ports of a single board reaches a certain value.
• D.When the difference between the main and standby optical power exceeds the threshold, the optical switch will switch the service to the standby channel, and the set value supports query. The recommended setting is 5db.

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