Exam Code: 4A0-265
Exam Name: Nokia Optical Diagnostics and Troubleshooting
Certification Provider: Nokia
Corresponding Certification: Nokia Optical Network Services Expert
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Nokia 4A0-265 Exam Syllabus Topics:

SectionWeightObjectives
Transponder and System Fault Resolution20%- Optical transponder faults
  • 1. Protection switching behavior
    • 2. Line and client-side issues
      - Service restoration
      • 1. Using Nokia support resources
        • 2. Trail and connection recovery
          Troubleshooting Methodologies30%- Alarm and condition interpretation
          • 1. Fault isolation procedures
            • 2. Channel and line interface issues
              - Common optical impairments
              • 1. Non-linear effects, attenuation, dispersion
                • 2. Power balancing and adjustment
                  Optical Diagnostics and Monitoring Tools25%- Nokia management interfaces
                  • 1. Web GUI and command-line access
                    • 2. Engineering and Planning Tool (EPT) reports
                      - Performance Monitoring (PM) data analysis
                      • 1. Optical power levels and OSNR measurement
                        • 2. Wavelength Tracker (WT) functionality
                          Optical Network Architecture and Signal Flow25%- 1830 PSS node architecture
                          • 1. FOADM, ROADM, CDC-F structures
                            • 2. Optical signal path and power budget
                              - Amplifier configurations
                              • 1. Unidirectional/bidirectional amplification
                                • 2. Ingress/egress amplification schemes

                                  Nokia Optical Diagnostics and Troubleshooting Sample Questions:

                                  1. What is the default severity level for a Threshold Crossing Alert (TCA) alarm?

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


                                  2. Consider the exhibit. A single directional fiber cut is occurring between two amplifiers in bidirectional configuration. Which node(s) will report a "LD Input LOS" alarm?

                                  A) Node A only
                                  B) Node C only
                                  C) Node A and Node B
                                  D) Node B only


                                  3. Which of the following statements about the "config powermgmt egress 1/2 adjust status command" is TRUE?

                                  A) The command displays the status of power adjustment on the specified egress amplifier.
                                  B) The command enables power adjustment feature on the specified egress amplifier, as this feature Is always and only available at the egress amplification stage.
                                  C) The command displays commissioning status and WT decoder usage for the specified egress amplifiers only, as this feature is always and only done in the egress direction.
                                  D) The command enables power adjustment feature on the specified egress amplifier.


                                  4. A "Power Adjustment Required" alarm was raised on the ingress amplifier in slot 1/10. Which of the following commands should be entered to manually adjust the related amplifier optical power levels?

                                  A) config powermgmt ingress 1/10 scot
                                  B) config powermgmt ingress 1/10
                                  C) config powermgmt ingress 1/10 adjust
                                  D) config powermgmt ingress 1/10 power adjustment


                                  Solutions:

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

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