H20-923_V1.0 Exam Dumps : HCSP-Field-Data Center Facility V1.0

In Huawei alarm management,masking rulesare used to control how alarms are handled and displayed during specific conditions, such as planned maintenance, commissioning, device replacement, or known temporary abnormalities. When a masking rule is applied, the system can change how an alarm is classified so that O&M staff can distinguish between alarms that require immediate action and alarms that are expected or should be excluded from operational statistics. Two key statuses that masking rules can assign areMaintenanceandInvalid.Maintenanceindicates the alarm is generated during an approved maintenance activity (for example, power-off tests, sensor rewiring, cooling maintenance), so it is treated as expected and does not trigger normal escalation logic.Invalidindicates the alarm is not considered effective for operational follow-up—commonly used when a point is confirmed to be non-applicable, temporarily disabled, or its triggering condition is not meaningful to current operations. By contrast,ValidandStandardrepresent normal alarm handling states rather than outcomes specifically “identified by masking rules.”

In Huawei delivery scenarios, apreinstalled servermeans the target software (for example, the NetEco platform and its required runtime components) has already been deployed and integrated on the server image before it is handed over for on-site commissioning. Because the installation media has already been applied, the on-site engineer’s work typically shifts from “software installation” to “environment verification and initialization,” such as confirming OS/service status, checking resource allocation, validating database and middleware health, verifying network planning (IP, gateway, DNS/NTP as required), and completing application-level initialization (site creation, user/role configuration, northbound interface settings, and device/model import if needed). In this case,downloading the full installation package is not a mandatory stepfor commissioning, because the package is mainly required when performing a fresh installation or reinstall/upgrade. However, standard practice is still to prepare supporting materials (patches, licenses, and compatibility documents) and ensure the preinstalled version matches the project baseline before acceptance.

In data center power systems, the utility grid frequency standard iseither 50 Hz or 60 Hz, depending on the country/region. Data center facility equipment—such as UPS systems, power distribution units, switchgear, and monitoring components—is designed to operate reliably under these standardized grid frequencies, with acceptable tolerance ranges around the nominal value. While some power conversion equipment can adapt between50/60 Hz(for example, via frequency tracking or double-conversion),70 Hz is not a standard utility frequencyused for data center facility power supply, and it is not treated as a normal operating frequency in typical design, acceptance testing, or O&M procedures. From an operations perspective, maintaining correct frequency is critical because abnormal frequency can trigger UPS transfer logic, increase losses, create synchronization issues with bypass sources, and negatively affect downstream IT loads. Therefore, stating that power supply equipment frequency “can be 50 Hz, 60 Hz, or 70 Hz” is incorrect for standard data center infrastructure practice.