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Nokia Optical Diagnostics and Troubleshooting Sample Questions:

1. Which of the following Performance Measurement (PM) type is NOT typically retrieved at an Optical Transponder (OT) line interface?

A) Optical Power Received (OPR)
B) Ethernet collision counters
C) Digital Wrapper (DW)
D) Forward Error Correction - Errors Counted (FEC-EC)

2. Consider the exhibit.

Which type of loopback is applied?

A) Line port terminal Ioopback
B) Client port facility loopback
C) Client port terminal Ioopback
D) Line port facility Ioopback

3. Which of the following statements best describes the Forward Error Correction (FEC) technique?

A) FEC enables errors to be detected and corrected without retransmission. This technique is effective only below a specified OSNR threshold.
B) FEC enables errors to be detected and corrected without retransmission. This technique is effective only above a specified OSNR threshold.
C) FEC enables errors to be detected and data to be retransmitted. This technique is effective only below a specified OSNR threshold.
D) FEC enables errors to be detected and data to be retransmitted. This technique is effective only above a specified OSNR threshold.

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

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

Solutions: