Add up fiber, connector, splice, and splitter losses to see the power arriving at the ONT and whether your link has enough margin above the ONT receiver sensitivity.
In a fibre (GPON) network, the light from your OLT is split many ways and loses strength over distance, through connectors, and at each splice. This tool adds up those losses and tells you whether enough signal reaches the customer's box (the ONT) for the connection to work reliably.
Our FTTH rollout guide covers OLT selection, split ratio design, and fiber plant planning, and Network Design and Optimization covers the full build as an engagement.