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| Section | Objectives |
|---|---|
| Remote Operations of 5G Radio Access Networks | - 5G RAN Operations Center Procedures
|
| Software Management | - Base Station Software Operations
|
| Configuration Management | - Parameter Administration
|
| Fault and Alarm Management | - Monitoring and Troubleshooting
|
| 5G RAN Products and Solutions Management | - Network Connectivity and Access
|
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NEW QUESTION # 121
After a remote configuration change causes unexpected cell behavior, and the automatic fallback mechanism does not fully resolve the issue, what is the most appropriate next step for the NOC engineer?
Answer: A
Explanation:
When a configuration change leads to unexpected behavior and any automatic fallback does not fully restore normal operation, the appropriate recovery action is to restore the affected network element's configuration from the most recent verified backup taken before the change was applied. This returns the element to its known-working state, addressing the immediate service impact while the root cause of the unexpected behavior from the new configuration can be investigated separately, outside of the live production environment if needed. This is precisely why taking and verifying a pre-change backup is emphasized as a best practice - it provides exactly this kind of recovery option. Decommissioning the cell is a drastic and disproportionate response to a configuration issue; applying an unrelated template introduces further uncertainty and risk; and taking no action prolongs any service degradation unnecessarily, which is inconsistent with the NOC's responsibility to restore service promptly.
NEW QUESTION # 122
A NOC engineer needs to recover a base station from a state where its parameter settings have been corrupted, but the underlying software load is functioning correctly. Which type of backup would be most directly applicable to resolving this specific issue?
Answer: C
Explanation:
When the issue is specifically that parameter/configuration data has become corrupted while the underlying software load remains functional, the most directly applicable recovery resource is a configuration backup - which contains the parameter settings (cell configuration, neighbor relations, transport settings, and so on) independent of the software image. Restoring from a configuration backup can address the corrupted settings without the additional time and disruption of reinstalling or reactivating software, which would be unnecessary in this scenario since the software itself is not the problem. Configuration data is a distinct dataset from the software image, not embedded within it, which is precisely why configuration-only backups exist as a lighter-weight option for scenarios like this. Alarm history and PM counter exports are records of operational events and measurements respectively - neither contains the parameter configuration data needed to restore an element's settings, making them unsuitable for this recovery scenario.
NEW QUESTION # 123
What is a 'threshold crossing alert' (TCA), and how does it differ from a standard equipment fault alarm?
Answer: C
Explanation:
A threshold crossing alert (TCA) is generated when a monitored performance counter or KPI - such as PRB utilization, processor load, or a quality metric - crosses an operator-configured threshold value, providing visibility into a performance-related condition that may or may not correspond to an actual hardware fault.
For example, sustained high PRB utilization on a cell might trigger a TCA flagging a capacity concern, prompting capacity planning or optimization actions, even though no equipment has failed. This differs fundamentally from a standard equipment fault alarm, which is raised in direct response to a detected hardware or communication failure condition. TCAs are configurable by the operator, allowing thresholds to be tuned to the network's specific performance targets and capacity planning needs, and they are not limited to software license conditions, nor are they fixed, unconfigurable values.
NEW QUESTION # 124
Before a field engineer disconnects and removes an RF unit for replacement, what action should the NOC engineer typically perform first?
Answer: B
Explanation:
Before a field engineer physically disconnects an RF unit, the NOC engineer should administratively lock the affected cell(s). Locking puts the cell into a controlled, planned out-of-service state, which has several benefits: it allows UEs currently served by the cell to be handed over or to reselect to neighboring cells in an orderly manner before the disconnection occurs, and it ensures that when the RF unit is disconnected, the resulting alarms are correctly understood by the NOC and any monitoring systems as part of a planned maintenance activity rather than an unexpected fault requiring separate investigation or triggering unnecessary alerts/escalations. Increasing neighboring cells' power is not a standard or necessary preparatory step and could introduce interference; deleting the configuration would require a full re- commissioning afterward; and changing the PLMN ID would be both ineffective at preventing the brief outage and disruptive to network identification.
NEW QUESTION # 125
An operator is considering reducing the PM Result Output Period (ROP) for a set of cells from 15 minutes to
1 minute to enable near real-time troubleshooting. What is the most significant operational trade-off of this change?
Answer: B
Explanation:
Reducing the Result Output Period increases the frequency at which performance counters are collected, processed, and stored, which proportionally increases the volume of measurement data generated by each network element. Moving from a 15-minute to a 1-minute ROP, for example, would generate roughly fifteen times more data points over the same time period. This places significantly higher demand on the file transfer, processing, and storage capacity of NetAct and any downstream analytics systems, and can also increase signaling and processing load on the base stations themselves. While finer granularity can be valuable for short-term, targeted troubleshooting of a specific cell during an active investigation, it is not typically sustainable as a network-wide, long-term configuration. KPI formulas remain valid regardless of ROP, alarm notifications are a separate mechanism unaffected by PM ROP settings, and historical trending remains possible - it simply involves more granular data points.
NEW QUESTION # 126
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