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

The stage during equipment activation is where adjustments to attenuation levels are made for the first time. This phase involves the initial powering up of the fiber-optic network components and the necessary calibration to ensure that the system operates at optimal performance levels.

During equipment activation, technicians measure the signal loss (attenuation) as the network components are energized and interconnected. This process is crucial because it helps identify any issues with the installation, such as bends or poor connections that might lead to excessive signal loss. Adjusting the attenuation levels ensures that the signal strength meets specified requirements for quality communication, thus enhancing the overall performance of the network.

Final testing, pre-installation testing, and routine maintenance checks focus on different aspects of the network setup and operation. While final testing may confirm that all adjustments have been correctly implemented, it does not typically involve initial adjustments. Pre-installation testing is conducted before any equipment is installed to ensure readiness, and routine maintenance checks occur after the network is operational to ensure it continues to function within acceptable parameters.