Optical Time Domain Reflectometers (OTDRs) and fault locators from AFL are used to certify new fiber installations and locate faults in deployed fiber optic networks. OTDRs and fault locators are available for single-mode long-haul, metro, and access networks, including FTTx PONs. OTDRs are used by network installation and maintenance technicians to scan fiber optic networks from one end of the fiber, display a trace, locate and measure detected events such as splices, connectors, splitters, macro-bends and fiber end. Fiber length, loss, and ORL is reported along with location, loss and reflectance of detected events. OTDRs are available with an integrated visual fault locator (VFL), optical light source (OLS), and/or optical power meter (OPM). OTDR results can be saved and uploaded to PC for archiving and/or further analysis using TRM 2.0 Test Results Manager PC software.