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. QUAD OTDRs are available for technicians installing or maintaining optical networks having a mix of singlemode and multimode fibers. OTDRs scan fiber optic networks from one end of the fiber, displaying a trace and reporting detected events such as splices, connectors, macro-bends and fiber end. Fiber length is reported along with location, loss and reflectance of detected events. OTDRs are available with 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.