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Huawei Certified Network Professional-Building Carrier OTN Transmission Network Exam (H31-331) - Huawei Exam Questions

Last updated on June 20, 2026

97% Exam Compliance
180 Total Questions
1
Question
The name of the network layer that exists between the multiplexer and the demultiplexer, which of the following is true.
Options
A OSC
B OMS
C OTS
D OCh
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2
Question
Which of the following descriptions of APE functions are correct? (multiple choice)
Select 2
Options
A The APE protocol frame is exchanged between the receiving end and the transmitting end through the network element communication channel, and the APE command is issued to announce the execution result of the APE.
B The optical power of each channel is automatically detected by the detecting unit at the transmitting end, and an optical power adjustment command is issued to the adjusting node according to the detection result.
C APE (Automatic Power Equilibrium) is used to automatically detect and adjust the optical power of each channel of the WDM interface to maintain the flatness of the optical power of each channel.
D At the receiving end, according to the requirements of the optical power adjustment command,
the optical power is automatically adjusted by the adjusting unit, and the optical power adjustment result of the detecting node is notified.
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3
Question
The overload optical power of the APD type receiving laser is only -9dBm, and it is especially necessary to be cautious to prevent the optical module from being burnt due to excessive power.
Options
A False
B True
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4
Question
Which of the following conditions does not trigger the customer side 1+1 protection automatic switching?
Options
A ODUk_PM_LCK
B OTUk_TIM.
C Hard reset of the board.
D OSC_LOS
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5
Question
During the normal operation of the network, the service working channel protected by the ODUk SNCP generates the conditions for triggering the protection switching. The service is automatically switched to the protection channel. After the working channel is faulty, the service cannot be automatically restored back to the working channel.

Which of the following are the possible reasons ()? (multiple choice)
Select 4
Options
A Artificially implemented manual switching, lock switching or forced switching commands
B The protection group “recovery mode” is “non-recovery”
C The SNCP type is inconsistent with the business scenario requirements.
D When the working channel is normal, the service needs to be delayed by the “waiting for recovery time” and then switched back to the working channel by the protection channel.
E A small number of errors occur in the working channel
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