Triple-Play Service Deployment

Chapter 3: Deploying and Troubleshooting Fiber Networks
Visual Fault Locators and Fiber Inspection Microscopes
Most fiber link problems occur at the extremities and involve
components such as the connectors and patch cords. These
problems often can be resolved with tools such as visual fault
locators (VFLs) (635-650 nm) and fiber inspection scopes.
The visual fault locator tests continuity of a short fiber link up to
5 km and identifies any critical bends or breaks in patch cords
or inside fiber cabling. When a bend or break does occur, the
visible red light leaks from the fiber and can be detected visually
by the operator.
Visual Fault Locator
A handheld fiber inspection microscope
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