Time Required: Testing takes seconds per cable; minimal setup Steps: 3 Supplies: Fiber optic connectors, fiber optic cables, fiber optic tracer or visual fault locator, and a fiber optic microscope. This tutorial will help you find out if your fiber cables and connectors are fit for transmission, in just a. Fiber optic testing for continuity is crucial in ensuring that light transmits through fiber optic cables without interruptions, safeguarding seamless data transmission. Fiber optic. Regularly testing fiber optic cables helps minimize network downtime, lengthens the network's longevity, reduces maintenance requirements, and helps support network reconfiguration and upgrades. No setup or interpretation is required — just place it in front of the fiber end face or port, and a light and tone indicate an active fiber.