For most users, starting with or Telcordia SOR Viewer covers basic needs. For heavy multi‑vendor environments, Fiberizer or VIAVI StrataSync offers the broadest compatibility. If you need help selecting a specific viewer for your use case (field use, lab, production, or education), let me know.
1. Introduction An OTDR (Optical Time-Domain Reflectometer) is a fundamental tool for testing and troubleshooting fiber optic cables. It works by sending a short pulse of light into the fiber and analyzing the backscattered and reflected light. The result is a trace — a graphical representation of signal loss versus distance. otdr sor file viewer