Visual Fault Locator is a very basic tool which is used to test a small distance fiber network.
The VFL emits a red Light which the engineer to check for the network issues, this tool is very helpful in determining the micro and Macro bends in the patchcords, patch panels and also in Enclosures
Visual Fault Locator can also be used to identify fibers in multi-fiber cables. Visual Fault Locator is designed for both single mode and multimode fiber optic applications.