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| Section | Objectives |
|---|---|
| Fault and Alarm Management | - Monitoring and Troubleshooting
|
| Remote Operations of 5G Radio Access Networks | - 5G RAN Operations Center Procedures
|
| Configuration Management | - Parameter Administration
|
| Software Management | - Base Station Software Operations
|
| 5G RAN Products and Solutions Management | - Network Connectivity and Access
|
>> NRN-522 Originale Fragen <<
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19. Frage
Which alarm severity level generally requires the MOST urgent NOC response under standard SLA-based prioritization?
Antwort: A
Begründung:
In the standard alarm severity model used across telecom Fault Management systems, including NetAct, Critical alarms represent the highest severity, typically indicating a total or near-total loss of service, capability, or capacity with immediate and significant impact on subscribers - for example, a complete cell or site outage. Because of this severe impact, Critical alarms require the most urgent NOC response and are governed by the tightest response and resolution timeframes among all severity levels in most operational SLAs. Major alarms indicate serious degradation requiring prompt, though slightly less immediate, action.
Minor alarms represent non-service-affecting issues that should be addressed to prevent escalation, and Warning alarms are typically informational or preventive, requiring the least urgency. Correctly prioritizing Critical alarms above all others ensures NOC resources focus first on the issues with the greatest impact on network availability and customer experience.
20. Frage
After exhausting standard remote troubleshooting steps for a persistent Major alarm that remains unresolved, what is the appropriate NOC action?
Antwort: A
Begründung:
When standard remote troubleshooting steps for a persistent Major alarm have been exhausted without resolution, the appropriate NOC action is to follow the organization's defined escalation procedures - this may involve escalating to a higher-tier technical support team, a specialist engineering group, or field operations for a possible site visit, depending on the nature of the fault. Critically, the engineer should document the troubleshooting steps already performed, observations made, and relevant data gathered (alarm history, performance data, configuration checks), so the receiving team can proceed efficiently without repeating completed work. Ignoring the alarm leaves a genuine network issue unaddressed and risks breaching service level agreements. Deleting the alarm from NetAct does not resolve the underlying fault and removes valuable diagnostic history. Locking all cells across the entire network is a drastic, disproportionate action that would itself cause a massive outage and is never an appropriate response to a single persistent alarm.
21. Frage
Within NetAct, which functional module is primarily responsible for planning, distributing, and activating software packages across base stations?
Antwort: A
Begründung:
The Software Management (SWM) module within NetAct is the centralized functional area responsible for the end-to-end software lifecycle of base stations and other network elements, including planning software deployment campaigns, distributing (downloading) software packages to target network elements, scheduling and triggering activation, and monitoring the success or failure of these operations across potentially large numbers of sites. This is distinct from Fault Management (FM), which handles alarms and fault conditions; Performance Management (PM), which handles KPI and counter-based performance data; and Configuration Management (CM), which handles parameter and configuration provisioning. While these modules may interact - for example, a software activation might generate alarms visible in FM, or a software change might necessitate subsequent configuration adjustments via CM - the core responsibility for managing software packages, versions, and activation campaigns rests specifically with SWM, making it the primary tool a NOC engineer would use for software lifecycle activities.
22. Frage
Why is it important for the NOC engineer to confirm the affected cell is locked and showing as out-of-service (in a planned state) before instructing the field engineer to disconnect any RF cabling at the antenna?
Antwort: C
Begründung:
Confirming that a cell is locked and in a planned out-of-service state before any physical RF disconnection serves two important purposes. From a safety perspective, a locked cell is not actively transmitting in normal traffic-carrying operation, reducing RF exposure risk to the field engineer working near the antenna or cabling. From an operational perspective, performing the disconnection on a cell already in a planned, controlled state ensures that the resulting loss of RF connectivity is correctly interpreted within the context of an ongoing planned maintenance activity, rather than triggering an unplanned fault condition that might generate urgent alarms, automatic notifications, or even unnecessary escalations to other teams who are unaware that work is in progress. Locking a cell does not increase its transmit power (the opposite is true - it stops normal transmission), does not trigger any automated parts dispatch, and has no effect on PLMN ID or network-wide UE registration, which are unrelated to a single cell's administrative state.
23. Frage
In NetAct Performance Management, what is the standard default Result Output Period (ROP) used for collecting and reporting most cell-level performance measurement counters?
Antwort: A
Begründung:
The default Result Output Period (ROP) for performance management counters in Nokia's RAN solution is 15 minutes. This interval provides a practical balance between granularity and system load: it is short enough to allow NOC engineers to detect emerging issues, congestion trends, and KPI fluctuations close to real time, while not generating an unmanageable volume of measurement data that would overwhelm storage and processing resources in NetAct. Fifteen-minute granularity is widely used as the basis for accessibility, retainability, mobility, integrity, and availability KPI formulas, and is the standard interval referenced in performance dashboards and automated reports. While other reporting intervals (such as 1 hour or 24 hours) can be configured for specific measurement jobs or long-term trend analysis, the 15-minute ROP remains the operational baseline for day-to-day RAN performance monitoring and troubleshooting activities performed by remote operations teams.
24. Frage
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