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Huawei Certified Network Professional-Building Carrier OTN Transmission Network Sample Questions:

1. The extensive use of EDFAs in wavelength division systems is the most important cause of signal-to-noise ratio degradation.

A) True
B) False

2. Which of the following is a description of the normative layout of cables? Which one is wrong?

A) The -48V power cable is equipped with a black cable, the power ground wire is a blue cable, and the PGND protection ground wire is a yellow-green or yellow cable.
B) The bending radius of the fiber placement should not be less than 40mm
C) Try to use a large bending radius (radius greater than 60mm) when turning the cable, and do not tie the cable at the corner.
D) The distance between the power cable, ground wire and signal cable outside the cabinet is more than
30mm.

3. The OptiX OSN 8800 T64 fan speed control has only automatic mode and no adjustable mode.

A) True
B) False

4. Which of the following boards provides clock time input and output interfaces in the OptiX OSN 8800?

A) STI
B) ATE
C) AUX
D) EFI

5. Which of the following is the implementation principle of the ALC function, which one is wrong?

A) When the line is degraded, first adjust the nominal gain of the optical amplifier unit, and then adjust the attenuation value of the attenuation adjustment unit (VOA) to ensure the power budget of the entire link.
B) The reference node transmits its output optical power value downstream every 10 seconds, and the detection node transmits the offset value of the amplifier gain and attenuation. Each node transmits the output optical power and the accumulated deviation value to subsequent nodes.
C) Compare the deviation between line attenuation and amplifier gain and the way the node gain compensates for offset.
D) When the line returns to normal, if the nominal gain of the amplifier unit does not match the gain reference value, the amplifier gain is first adjusted back to the reference value, and then the attenuation value of the VOA is adjusted to ensure the power budget of the entire link.

Solutions: