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?

• A. Permanently lock the cell and close the maintenance ticket as complete
• B. Immediately order a replacement baseband module to be shipped to the site
• C. Change the cell's PLMN ID to force the eCPRI link to re-establish
• D. Ask the field engineer to verify the physical fiber connections and SFP transceivers between the baseband and the new RF unit before pursuing further remote diagnosis

When configuring NR-NR (5G-to-5G) neighbor relations to support mobility between two 5G cells operating on different frequency bands, which type of neighbor relation must be established?

• A. An EN-DC relation, since any handover involving different frequencies requires LTE anchoring
• B. An inter-frequency neighbor relation, including the appropriate frequency and measurement configuration for the target band
• C. No neighbor relation is required since inter-band handovers occur automatically without configuration
• D. An intra-frequency neighbor relation only

A specific neighbor relation between Cell A and Cell B shows a consistently low handover success rate, while overall network-wide mobility KPIs remain healthy. What is the most appropriate first troubleshooting step?

• A. Restart the entire baseband module serving Cell A
• B. Review and verify the neighbor relation configuration and measurement parameters between Cell A and Cell B
• C. Reboot the core network mobility management element
• D. Increase the transmit power of every cell in the cluster

Why is it considered a best practice to verify the integrity of a configuration or software backup file shortly after it is created, rather than assuming the backup process completed successfully?

• A. Because verification is required by NetAct before any alarms can be displayed for the element
• B. Because a backup that appears to have completed without verification could be incomplete or corrupted, and this would only be discovered when it is needed for a restore - at which point recovery options become severely limited
• C. Because unverified backups cause the base station to continuously restart
• D. Because backup verification automatically improves the cell's KPI performance

Before activating a newly downloaded software package on a base station, why is it important to verify software compatibility with the unit's current hardware and configuration?

• A. Because activating an incompatible software package can result in activation failure, degraded functionality, or the unit failing to return to normal operation, even if the automatic fallback eventually recovers it
• B. Because compatibility verification eliminates the need for any post-activation monitoring
• C. Because software compatibility checks are only relevant for 2G equipment and do not apply to 5G base stations
• D. Because compatibility checks automatically update the site's physical inventory records