A typical OTDR trace viewer has the following features:
The OTDR trace viewer is not a simple "pass/fail" screen. It is a geological map of your fiber link. Learning to interpret the bumps, dips, and spikes is what separates a cable puller from a network diagnostician.
"Distance: 12.4 kilometers," Elias read. "Location... that puts it right under the old river bridge."
When you look at an OTDR trace viewer, you are looking at a graph. The represents distance (length of the fiber). The Y-axis represents signal loss (dB).