An Optical Power Meter and Laser Light Source will be used to measure power loss on each completed ring or distribution span to verify continuity between fibers (no fibers incorrectly spliced together). As the components like fiber, connectors, splices, LED or laser sources, detectors and receivers are being developed, testing confirms their performance specifications and helps. The Contractor tasked to perform testing or splicing on any fiber optic cable will follow these testing standards to fulfill their contractual obligations. The Contractor must utilize the correct equipment and testing techniques to gain acceptance, or the work cannot be approved. This testing. This Applications Engineering Note (AEN 135) explains and recommends standard measurement methods for characterizing optical fiber system performance. This note also provides background information on system link configurations, test equipment and system component considerations that influence. Regularly testing fiber optic cables helps minimize network downtime, lengthens the network's longevity, reduces maintenance requirements, and helps support network reconfiguration and upgrades. If it's a long outside plant cable with intermediate splices, you will.