VIAVI FI-60 Live Fiber Identifier (LFI) with detachable measuring head The Live Fiber Identifier allows easy identification of the optical signal without disconnecting the fiber link or interrupting the network traffic. It can also be used as an optical level meter (OPM). VIAVI's FI-60 LFI allows users to easily locate the optical signal without disconnecting the fiber link or disrupting the network traffic. In addition, the FI-60 LFI incorporates VIAVI's unique SafeChekTM system, which ensures safe and repeatable connection to most fiber types without the need to replace expensive inserts. Since the FI-60 can also be used as an optical level meter (OPM), it saves costs and reduces the amount of equipment you need to carry on site. Benefits: