Designed for Enterprise, Datacenter, Outside Plant and PON Fiber As fiber networks evolve, the need to test in more locations has increased. OTDRs are now needed for: FTTx Enterprise OSP PON POLAN Many OTDRs designed for fiber troubleshooting are designed for carrier and contain cumbersome and complicated features. The OptiFiber Pro OTDR family is the first class of OTDRs that is built with features and usability for both the enterprise network engineers, and cable installers working in both enterprise and OSP environments.