Fiber optic tester that performs link verification and automated fault tracking in seconds. Empowering frontline technicians to explore further and do more. An innovative, fast and simple-to-use fiber optic tester, Optical Explorer verifies optical links in seconds and automatically explores further when potential issues are suspected. It measures key optical parameters such as loss (dB), optical return loss (dB), length (meters) and power (dBm) and provides automated diagnostics (EXFO Advisor 5-star rating).