Find problems in seconds to reduce downtime and boost productivity! A fiber optic fault locator uncovers issues on complex, established networks and also supports new fiber link installations. Problems can be identified on networks consisting of fibers, connectors and patch cords. A device that is designated as a distance and fault locator will deliver distance and power information on losses and breaks. This type of instrument also measures fiber length and identifies live fiber. A visual fault locator (VFL) locates fiber and identifies bad connections. It can verify cable continuity and polarity. VFLs are normally used on exposed lengths of fiber.