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Nokia Optical Diagnostics and Troubleshooting Sample Questions:

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

A) When channels pass through amplifiers, all of them always experience a similar amplification.
B) 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.
C) Ingress amplifiers are always more powerful [than egress amplifiers, to reduce the impact of non-linear effects.
D) The Optical Supervisory Channel (OSC) is amplified when passing through all amplifier types, except for Raman which is not based on EDFA.

2. Which of the following statements best describes the payload type setting?

A) Payload type attribute Is recorded within the client payload and can be set automatically.
B) Payload type attribute is recorded within the OTN overhead and can be set automatically or manually.
C) Payload type attribute is recorded within the client payload and must be entered manually.
D) Payload type attribute is recorded within the OTN overhead and must be entered manually.

3. When troubleshooting possible generic fiber cuts, the recommended first step is to: 1. Review alarms at nodes where power loss occurs.
What is the next recommended step?

A) Review PM data to determine if the problem is intermittent.
B) Perform network power traces to attempt to determine the point of power loss.
C) Review EPT design for calculated span loss.
D) Monitor amplifier total power in/out to isolate the direction of a possible cut.

4. Which of the following issues can cause a "Loss too low" message to be displayed after a power adjustment has been provided?

A) A dirty fiber connector
B) Unstable optical power levels
C) An incorrect EPT network design
D) A defective WSS unit

Solutions: