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Nokia Optical Diagnostics and Troubleshooting Sample Questions:

1. 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. Determine the active clock reference source.
3. Switch to alternate clock source (PF).
4. Replace the suspect 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. Replace the suspect PF.
3. Determine the active clock reference source.
4. Switch to alternate clock source (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).

2. Which of the following statements correctly describes where power adjustments can be performed?

A) In unidirectional configurations, both ingress and egress power adjustments are performed against the ingress amplifiers only.
B) In bidirectional configurations, both ingress and egress power adjustments are performed against the ingress amplifiers only.
C) When Raman pumps are used, both ingress and egress power adjustments are performed against the Raman pump directly.
D) In bidirectional configurations, ingress power adjustments are performed against the ingress amplifiers, while egress power adjustments are performed against the egress amplifiers.

3. Consider the exhibit.

Which type of loopback is applied?

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

4. Which of the following is NOT a characteristic of an Optical Supervisory Channel Loss of Signal (OSC LOS) issue, in case that no "LD Input LOS" alarms are raised against the involved amplifiers?

A) Traffic does not pass between the local and adjacent nodes.
B) A "Data Link Down" alarm is raised on the adjacent node.
C) A "Power Adjustment Required" alarm is eventually raised on the local node.
D) An "Incoming SUPVY LOS" alarm is raised on the local node.

Solutions: