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| Certification Vendor: | Nokia |
|---|---|
| Exam Name: | Nokia 5G RAN Network Operations Expert |
| Exam Number: | NRN-522 |
| Related Certifications: | Nokia 5G RAN Design Expert Nokia 5G RAN Optimization Expert Nokia 5G RAN Network Professional (NRNP) Nokia 5G RAN Field Operations Expert |
| Available Languages: | English |
| Sample Questions: | Nokia NRN-522 Sample Questions |
| Exam Way: | Nokia certification exam delivered through authorized testing channels; availability may include online-proctored and/or test-center delivery depending on region and Nokia certification policies. |
| Pre Condition: | Recommended to have achieved the Nokia 5G RAN Network Professional (NRNP) certification before pursuing the Expert-level certification. Passing the mandatory NRN-522 exam is required for certification. |
| Official Syllabus URL: | https://www.nokia.com/networks/training/5g/ran/certifications/expert/ |
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Nokia NRN-522 (Nokia 5G RAN Network Operations Expert) Certification Exam is a highly sought-after certification for professionals in the telecommunications industry. NRN-522 exam is designed to test the knowledge and skills required to operate and maintain a 5G RAN network. Nokia is one of the leading providers of telecom equipment and solutions, and this certification is a testament to their commitment to providing the best in the industry.
NEW QUESTION # 36
An 'Equipment Over-Temperature' alarm is raised at a remote site. Besides checking the cooling system itself, what else should a NOC engineer review related to this alarm?
Answer: B
Explanation:
An 'Equipment Over-Temperature' alarm indicates internal temperature monitoring has detected conditions exceeding safe operating limits, which can lead to performance throttling or automatic protective shutdown of the affected hardware. Beyond inspecting the cooling system itself, a NOC engineer should check whether related environmental alarms are also present at the site, such as a cabinet door-open alarm (which disrupts climate control), a fan failure alarm, or an HVAC/air-conditioning fault alarm for the shelter or cabinet.
These correlated alarms often explain an over-temperature condition by pointing to a broader site environmental issue rather than an isolated equipment defect, helping correctly scope the response (for example, escalating an environmental/facilities issue rather than treating it purely as a RAN equipment fault).
The cell's PCI value, handover success rate, and NetAct license expiry date are entirely unrelated to thermal conditions and would not assist in diagnosing this alarm.
NEW QUESTION # 37
A field engineer needs to work in close proximity to an antenna to replace a Tower Mounted Amplifier (TMA). What is the NOC engineer's most important responsibility before the field engineer begins this work?
Answer: B
Explanation:
When a field engineer needs to work in close physical proximity to an antenna - such as when replacing a Tower Mounted Amplifier - radio frequency (RF) exposure becomes a safety consideration, since active transmission from the antenna could expose the engineer to RF energy levels exceeding safe limits at close range. The NOC engineer's most important responsibility in this scenario is to coordinate placing the affected cell's RF transmission into a safe state - typically by locking the cell - before the field engineer begins work near the antenna, and to confirm this state is in place before giving the go-ahead. This directly supports the field engineer's physical safety. Increasing transmit power would worsen RF exposure risk and is the opposite of the correct action; scheduling for busy hours is irrelevant to the safety requirement and would also affect more subscribers; and disabling alarm notifications would reduce the NOC's situational awareness during the activity without providing any safety benefit.
NEW QUESTION # 38
While remotely piloting an RF unit replacement, the NOC engineer notices the new unit is detected but the cell fails to come into service, with an alarm indicating a CPRI/eCPRI configuration mismatch. What is a likely cause that the NOC and field engineer should jointly investigate?
Answer: B
Explanation:
A CPRI/eCPRI configuration mismatch alarm following a hardware replacement often indicates that the physical connection topology does not align with what the system's configuration expects - commonly because the replacement RF unit was connected to a different physical port on the baseband module than the original unit occupied. Since configuration data often references specific port mappings to associate logical cell configurations with specific physical RF unit connections, a port mismatch can prevent the system from correctly associating the detected hardware with the expected configuration, resulting in the cell failing to come into service despite the link being physically established. The NOC engineer should work with the field engineer to confirm exactly which physical port the new unit is connected to and compare this against the expected port mapping in the configuration, correcting either the physical connection or the configuration as appropriate. Cosmetic details such as cable ties or paint color, and unrelated identifiers like PLMN ID, have no bearing on this type of technical mismatch.
NEW QUESTION # 39
Before granting a new NOC engineer remote access credentials to production AirScale sites, what should be verified according to Nokia's operational security practices?
Answer: B
Explanation:
Before a new NOC engineer is granted credentials to access live production AirScale sites, operational security practice requires confirming the individual has completed the appropriate training for the tools, procedures, and risks involved, and that their account is provisioned with a role matching their actual job responsibilities, following the least-privilege principle of granting only the access necessary to perform assigned tasks. This minimizes the risk of accidental or unauthorized actions on a live network by inexperienced or over-privileged users. Owning a personal mobile phone or holding physical site keys relate to unrelated personal or facility-access matters and have no bearing on logical access provisioning for remote OAM systems. Granting unrestricted access to all NetAct modules by default directly contradicts least- privilege principles, increases organizational risk, and is explicitly the kind of practice operational security guidelines aim to prevent.
NEW QUESTION # 40
After a field engineer replaces an RF unit, the NOC engineer observes that the eCPRI link between the baseband and the new RF unit remains down, even after the cell is unlocked. What should the NOC engineer do first?
Answer: C
Explanation:
When an eCPRI (or CPRI) link remains down immediately following a physical hardware replacement, the most probable and easily verified cause is a physical-layer issue introduced during the replacement itself - such as a fiber connector not being fully seated, an SFP transceiver not properly inserted, a mismatched or faulty SFP module, or an incorrect port connection. Since the field engineer is already on site with direct physical access, the most efficient first step is to ask them to verify these physical connections before the NOC engineer invests time in deeper remote diagnostics, which would be premature given how common and simple physical connection issues are immediately after hardware work. Ordering a new baseband module is a significant escalation that should only follow ruling out simpler causes; locking the cell and closing the ticket would leave the site non-functional; and PLMN ID has no relationship to eCPRI link establishment, which operates at a lower layer entirely unrelated to network identity broadcasting.
NEW QUESTION # 41
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