Item Number: LFD-300B
Packaging Unit: 1 / each
  • Enables technicians to identify a specific live fibre without having to disconnect it
  • Pinpoints a specific live fibre using EXFO’s FiberFinder™ functionality
  • Locates a particular dark fiber using tone recognition (270 Hz, 1 kHz, 2 kHz)
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Product Information

Performing network upgrade or optical testing requires a fibre to be disconnected. This is often easier said than done, since finding the right connection can be tricky, namely because of fibre mislabelling or poor record keeping. While the dark fibre can be identified using a tone generator (270 Hz, 1 kHz, 2 kHz), the live fibre identification technique often involves one technician pulling one end of the patchcord, with another technician trying to identify which patchcord is moving at the other end—a process that translates into long delays and can result in unnecessary service disruption.

Combined with the TG-300B Tone Generator, the innovative LFD-300B FiberFinderTM Live Fibre Identifier* enables technicians to identify a specific live fiber without having to disconnect it and, above all, without having to guess.

EXFO’s LFD-300B performs an ambient light offset prior to fibre bending, which makes it less sensitive to ambient light. A push-down cap can also be placed on the head-end to block intense ambient light.


  • Non-intrusive power measurement and fibre identification
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