By injecting the light from a visible source, one can visually trace the fiber from transmitter to receiver to ensure correct orientation and check continuity besides.
Sharp bends, breaks, faulty connectors and other faults will “leak” the light allowing technicians to visually spot the defects.
The VFI/VFL is an ideal tool for locating a large number of defects that occur at connection points in and around fiber cabinets which are hidden in an OTDRs “blind-spot” or dead-zone.
Fosco Connect offers VFI units for both single-ferrule and multi-ferrule connector styles.
Note:
Some cable materials can absorb red light. Standard 3 mm yellow and orange patch leads generally provide good visibility. Many purple/gray/black cables do not.
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