When activating a fiber-optic network, which acceptance testing stage includes adjusting attenuation levels for the first time?

The process of activating a fiber-optic network involves several stages to ensure that the network performs optimally. The correct choice refers to the stage known as equipment activation. This phase is crucial because it is when technicians power up the equipment and begin the initial setup, which includes adjusting attenuation levels.

Attenuation refers to the reduction in signal strength as light travels through the fiber. During equipment activation, adjustments are made to account for various factors, including the distance the signal must travel, the quality of the fiber, and any connectors or splices that may introduce additional loss. By calibrating these levels at this stage, technicians ensure that the network can maintain a strong, reliable signal throughout its operation.

Other stages, such as final inspection or routine maintenance, do not involve the initial adjustments of attenuation levels. Final inspection typically focuses on verifying that the installation meets all specifications and regulations after installation is complete. Routine maintenance involves regular checks and adjustments but does not include the first-time setup and calibration that occurs during the activation phase. Therefore, activating the equipment is indeed the correct stage for the initial adjustments of attenuation levels in a fiber-optic network setup.