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Nokia Optical Diagnostics and Troubleshooting Sample Questions:

1. Which of the following statements about the Wavelength Tracker (WT) capability is TRUE?

A) WT uses a unique identifier based on a pair of numbers encoded by Raman amplifiers into each service wavelength direction.
B) Wave Keys are originated by optical amplifiers.
C) WT is compatible with other vendor domains, but the user must make sure that Wave Keys are unique on the crossed domains.
D) WT uses a unique identifier based on a pair of numbers encoded by Optical Transponders OTs) into each service wavelength direction.

2. Which of the following commands is used to retrieve the total output power level?

A) show interface am2125a 1/6/lineout detail
B) show interface am2125a 1/6/lineout wavekey
C) show interface am212 5a 1/6/lineout pm
D) show interface am2125a 1/6/lineout

3. Which of the following statements about optical power vs amplification stages is TRUE?

A) The Optical Supervisory Channel (OSC) is amplified when passing through all amplifier types, except for Raman which is not based on EDFA.
B) Ingress amplifiers are always more powerful [than egress amplifiers, to reduce the impact of non-linear effects.
C) When multiple channels pass through a shared port (for example, an amplifier line interface), the total aggregated power reflects the number of channels currently present.
D) When channels pass through amplifiers, all of them always experience a similar amplification.

4. Suppose a node is experiencing a little unexpected attenuation over the Optical Supervisory Channel (OSC) transmit direction. Which of the following statements is FALSE?

A) A "Data Link Down" alarm will raise on the adjacent node.
B) No OSC-related alarms will raise on the local node.
C) Traffic will pass between the local and adjacent node.
D) A Power adjustments action will fail on the local node.

Solutions: