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Nokia Optical Diagnostics and Troubleshooting Sample Questions:

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

2. Suppose a channel-related alarm is reported on an 1830 PSS node, and is related to a possible Wave Keys clock source issue. What is the recommended order for the following troubleshooting steps?

A) 1. Retrieve the channel power trace.
2. Replace the suspect PF.
3. Determine the active clock reference source.
4. Switch to alternate clock source (PF).
B) 1. Replace the suspect PF.
2. Retrieve the channel power trace.
3. Switch to alternate clock source (PF).
4. Determine the active clock reference source.
C) 1. Retrieve the channel power trace.
2. Determine the active clock reference source.
3. Switch to alternate clock source (PF).
4. Replace the suspect PF.
D) 1. Determine the active clock reference source.
2. Replace the suspect PF.
3. Retrieve the channel power trace.
4. Switch to alternate clock source (PF).

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

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

4. Which of the following statements best describes the output of the command: show xc 1?

A) A list of all boards on all nodes that this cross-connection passes through, along with expected power levels, measured power levels, and allowed power deviations.
B) A list of boards that this cross-connection passes through on the local node, along with administrative/operational states, expected power levels, and measured power levels.
C) A list of cross-connections, including A-end, Z-end, frequency, ID number, OCH trail name, and administrative/operational states.
D) OCH trail name, ITU channel, administrative/operational states, protection states, and Wave Keys for both directions.

Solutions: