The Fiber QuickMap troubleshooter, as a single-ended instrument, cuts down your troubleshooting time from hours to mere seconds. Averaging six seconds of test time, it quickly provides the visibility and data necessary to locate and fix any issues with your multimode fiber cabling. Tools normally used for troubleshooting are typically inefficient, ineffective, or both. Visual fault locators, lasers, or flashlights, while easy to use, have extremely limited troubleshooting capabilities because they are unable to distinguish or locate problematic loss or reflective incidents. They also require that the user maintain visual contact with the cabling while tracing its length to locate any faults. Not only is this process time-intensive, it is also unrealistic in many data center and campus environments in which the links run underneath floor tiles, behind walls, or underground. Power meters and sources are great for testing the entire channel to verify power and loss, but are inefficient for troubleshooting because the user must sequentially test a channel link-by-link, which can take several hours depending on the length of the channel and the number of links.