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| Section | Objectives |
|---|---|
| Remote Operations of 5G Radio Access Networks | - 5G RAN Operations Center Procedures
|
| Configuration Management | - Parameter Administration
|
| 5G RAN Products and Solutions Management | - Network Connectivity and Access
|
| Software Management | - Base Station Software Operations
|
| Fault and Alarm Management | - Monitoring and Troubleshooting
|
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NEW QUESTION # 58
What is the role of the Managed Object Model (MOM) in Nokia's RAN configuration management framework?
Answer: C
Explanation:
The Managed Object Model (MOM) defines the structured, hierarchical representation of all configurable entities within the network - such as network elements, their subordinate functional units, cells, and the individual parameters associated with each object - along with the relationships between them. Configuration management tools, including NetAct CM applications, rely on the MOM to know what objects exist, what parameters each object type supports, valid value ranges, and how objects relate to one another (for example, a cell object existing as a child of a baseband equipment object). Understanding the MOM is important for NOC engineers performing configuration changes, since it determines where a given parameter resides within the object hierarchy and what other objects or parameters might be affected by a change. The MOM is a configuration management construct and is unrelated to physical cabling documentation, alarm history (a fault management function), or software upgrade packages (a software lifecycle management function).
NEW QUESTION # 59
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?
Answer: C
Explanation:
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.
NEW QUESTION # 60
Over a period of several weeks, a NOC team observes that a particular cell's average PRB utilization during the busy hour has steadily increased from 60% to consistently above 85%, even though no faults or configuration issues have been identified. What is the most appropriate action based on this trend?
Answer: A
Explanation:
A steady upward trend in busy-hour PRB utilization over multiple weeks, in the absence of faults or configuration changes, is a classic indicator of organic traffic growth gradually consuming available capacity. While the cell may still be performing acceptably at 85% utilization, continuing this trend risks crossing into the congestion range (typically above 90%) where accessibility and throughput KPIs begin to degrade. The appropriate response is proactive: flagging the cell for capacity planning review allows engineers to evaluate options such as adding carriers, adjusting load balancing parameters, or planning sectorization before performance actually suffers. Ignoring the trend risks a reactive, customer-impacting outcome once congestion thresholds are crossed. Locking the cell or reducing transmit power would actively degrade service for existing users and is not an appropriate response to a capacity trend - these actions would be counterproductive and harm the very users the network is meant to serve.
NEW QUESTION # 61
A cell repeatedly raises and clears 'Cell Unavailable' alarms. Performance data shows PRB utilization dropping to zero during exactly the same periods. Which area should be investigated FIRST as the likely root cause?
Answer: B
Explanation:
When a cell repeatedly raises and clears 'Cell Unavailable' alarms, and PRB utilization simultaneously drops to zero during exactly those same intervals, this pattern strongly indicates the cell is genuinely going out of service intermittently, rather than a display or reporting artifact. The investigation should focus on causes capable of producing repeated, short-duration outages: transport link instability (brief link flaps causing loss of the cell's connectivity), loss of synchronization reference (particularly significant for TDD 5G, where sync loss can force a cell to stop transmitting to avoid interference), or unexpected hardware resets/restarts of the baseband or radio unit, potentially linked to environmental issues such as overheating or power fluctuations.
NetAct UI theme settings, subscriber handset models, and the billing system are entirely unrelated to RAN service availability and would not explain this correlated alarm and KPI pattern. Correlating alarm timing with PM data and environmental/transport alarms is a key NOC diagnostic technique.
NEW QUESTION # 62
In an EN-DC (E-UTRA New Radio Dual Connectivity) configuration, what role does the 5G NR cell typically play relative to the LTE cell?
Answer: C
Explanation:
EN-DC is a non-standalone (NSA) 5G deployment architecture in which a UE maintains simultaneous connections to an LTE eNB acting as the Master Node (MN) and a 5G NR gNB acting as a Secondary Node (SN). In this configuration, the LTE eNB anchors the control-plane connection to the Evolved Packet Core (EPC) and handles mobility management and signaling, while the NR cell primarily contributes additional user-plane throughput and capacity through dual connectivity, often substantially increasing the data rates available to the UE. This architecture allows operators to introduce 5G capacity using existing 4G core infrastructure, which is a common early-stage deployment strategy. Correct configuration of the EN-DC relation between the LTE and NR cells - including neighbor relations, frequency information, and capability signaling - is essential for the UE to be directed to add the secondary NR connection. EN-DC does not require identical PCI values between the LTE and NR layers, since they operate as distinct cells with independent identity spaces.
NEW QUESTION # 63
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