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Nokia 4A0-265 : Nokia Optical Diagnostics and Troubleshooting

4A0-265

Exam Code: 4A0-265

Exam Name: Nokia Optical Diagnostics and Troubleshooting

Updated: Aug 07, 2026

Q & A: 40 Questions and Answers

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Nokia 4A0-265 Exam Syllabus Topics:

SectionObjectives
Topic 1: Wavelength Tracker
Topic 2: Optical Signal Flow Through a Node
Topic 3: Performance Monitoring and Loopbacks for Troubleshooting
Topic 4: Alarms, Conditions and Logs
Topic 5: Optical Transponder Configuration Troubleshooting
Topic 6: EPT Report Parameters and Power Commissioning Data
Topic 7: Documentation and Support Information
Topic 8: Troubleshooting Fiber Cuts / Line Issues and Alarm Correlation
Topic 9: Transmission and Power Adjustment Troubleshooting Techniques

Nokia Optical Diagnostics and Troubleshooting Sample Questions:

1. Which of the following is a passive component in a CDC-F network configuration?

A) 130SCX10 Optical Transponder
B) MSH4-FSB Fiber Shuffle Module
C) WR20-TFM Wavelength Router
D) IRDM20 Integrated ROADM


2. A power adjustment has succeeded conditionally because of gain settings set to higher levels than expected by design. Which of the following alarms will raise?

A) Invalid topology (PRCDRERR-TOPO)
B) Power Adjustment Failure (PWRADJFAIL)
C) Gain Adjustment Exceeded Max Value (PWRMAXGAIN)
D) Amplifier Gain Tilt Adjustments Suspended (PWRTILTSUSP)


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

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


4. What is the typical severity level of a "Loss of Signal" (LOS) alarm?

A) Warning
B) Major
C) Critical
D) Minor


Solutions:

Question # 1
Answer: B
Question # 2
Answer: D
Question # 3
Answer: D
Question # 4
Answer: C

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