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| Section | Objectives |
|---|---|
| Topic 1: 5G RAN Products and Solutions Management | - Network Connectivity and Access
|
| Topic 2: Remote Operations of 5G Radio Access Networks | - 5G RAN Operations Center Procedures
|
| Topic 3: Fault and Alarm Management | - Monitoring and Troubleshooting
|
| Topic 4: Configuration Management | - Parameter Administration
|
| Topic 5: Software Management | - Base Station Software Operations
|
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NEW QUESTION # 24
After a remote piloting session for a hardware replacement is successfully completed and the site is confirmed to be back in normal operation, what should the NOC engineer do regarding the activity record?
Answer: D
Explanation:
After successfully completing a remote piloting session, documenting the activity in the appropriate maintenance ticket or change record is an essential closing step. This documentation should capture what actions were taken (both remotely and physically), the verification steps performed and their results (such as confirmation that the cell returned to service without alarms and that links were re-established), and the final status of the site. This record provides traceability for future reference - for example, if related issues arise later, or for audit and reporting purposes - and ensures continuity for other team members who may not have been involved in the original activity but need context later. Relying solely on verbal confirmation provides no lasting record and is inconsistent with good operational practice. Deleting the ticket immediately discards this valuable history, and sharing a field engineer's personal contact information with the broader team is unrelated to activity documentation and would raise privacy considerations.
NEW QUESTION # 25
A transport alarm 'Ethernet link down' is raised on the BTS-side interface toward the aggregation router. What is an appropriate FIRST remote action for the NOC engineer?
Answer: D
Explanation:
When a transport-side alarm such as 'Ethernet link down' is raised on the BTS-facing interface toward the aggregation router, the appropriate first remote action is to investigate the physical and data-link layer status of that interface - checking link/port status, interface configuration such as speed and duplex settings and VLAN membership, and any visible cable/connector status indicators through management tools. If the issue appears to originate on the transport provider's side of the connection (such as a leased line or microwave link fault), coordinating with that provider is the next step. Only if remote checks cannot resolve the issue, or clearly indicate a physical hardware or cabling fault at the site, would on-site dispatch be considered.
Replacing the RF module addresses radio hardware, not a transport link fault, and modifying neighbor relations or cell bandwidth are RAN configuration changes that would not resolve a physical link failure.
NEW QUESTION # 26
Why is it important for NOC personnel to establish a KPI baseline for each cell or site before evaluating whether current performance indicates a problem?
Answer: A
Explanation:
Establishing a KPI baseline for each cell or site - representing typical performance under normal operating conditions, accounting for factors such as time-of-day traffic patterns, geography, and cell configuration - provides the reference point against which current performance can be meaningfully compared. Without a baseline, it is difficult to tell whether an observed KPI value represents a genuine degradation requiring investigation, or simply normal variation for that particular cell. For example, a busy urban cell may normally operate with higher PRB utilization than a rural cell, so what is alarming for one cell may be entirely typical for another. Baselines support effective threshold setting for alerts, help prioritize investigation effort toward genuine anomalies, and are referenced continuously - not only during initial commissioning - whenever assessing whether performance has changed meaningfully. Baselines have no relationship to a cell's maximum transmit power, which is a separate RF configuration parameter.
NEW QUESTION # 27
A NOC engineer reviewing UE measurement reports notices that two physically adjacent 5G cells are broadcasting the identical Physical Cell Identity (PCI), causing UEs to receive ambiguous reference signals.
What is this condition called, and what is the appropriate remote corrective action?
Answer: A
Explanation:
A PCI collision occurs when two neighboring (geographically adjacent or mutually visible) cells are configured with the same Physical Cell Identity, causing UEs to be unable to reliably distinguish between them based on their synchronization and reference signals. This leads to degraded reference signal measurements, failed handovers, and potential interference between the two cells' signals. This is distinct from PCI confusion, where two non-adjacent cells that share a PCI are both neighbors of a third common cell, creating ambiguity during handover target selection even though the two same-PCI cells are not directly adjacent. The correct remediation for a PCI collision is a PCI replanning exercise, reassigning one of the conflicting cells to a unique PCI value that avoids both direct reuse with its neighbors and problematic modulo relationships that affect reference signal sequences. This is typically performed remotely via configuration management without requiring a site visit.
NEW QUESTION # 28
In the context of Nokia's Single RAN approach, what does it mean for a base station site's software package to support 'Single RAN'?
Answer: A
Explanation:
Single RAN is an architectural approach in which a common hardware platform - such as the AirScale System Module and associated radio units - and an integrated software package can simultaneously support multiple radio access technologies (for example, 2G, 3G, 4G, and 5G) on the same shared infrastructure, rather than requiring separate, technology-dedicated equipment for each generation. This significantly reduces the physical footprint, power consumption, and operational complexity at a site, since multiple technologies can be managed, monitored, and upgraded through unified O and M tools and processes. A Single RAN site is not restricted to a single technology - in fact, the opposite is true: it is designed specifically to host multiple technologies concurrently. It also does not require separate cabinets per technology, and it remains fully capable of receiving ongoing software upgrades and lifecycle management like any other deployment, with Single RAN describing the architectural integration rather than a static, unchangeable state.
NEW QUESTION # 29
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