How many 2M service boards can OSN7500 support at most?

• A.1
• B.2
• C.4
• D.3

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What are the possible reasons for the unsuccessful OCH creation by the path method?

• A.Source, sink but inconsistent half-wavelength configuration
• B.Missing service layer path
• C.The time on the device side and the network element side is not synchronized
• D.The data on the device side and the remote side of the network are not synchronized

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Which of the following are the possible reasons for the disconnection of network elements?

• A.The device is running
• B.All the optical paths to the NE are faulty
• C.Failure of the main control board of the network element
• D.The gateway network element connection is interrupted

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The EDFA erbium-doped fiber amplifier is a key component of the new generation of optical fiber systems.
Which of the following options are correct for the description of its advantages?

• A.High output power
• B.Gain Flattening
• C.The working wavelength is consistent with the minimum attenuation window of single-mode fiber
• D.High gain
• E.Low noise figure

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When performing single-site commissioning of SDH equipment, it is necessary to check the single-site hardware: including cabinet and subrack installation inspection, power line resistance measurement, cable layout specification inspection, single-board appearance inspection, and some single-board inspections. DIP jumper check

• A.True
• B.False

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