Open an OTDR trace or a power-meter reading and get it read back in plain terms — length, attenuation, events, light levels, and what each drop actually is. Everything runs on this phone; nothing is uploaded.
Ticked from the file — this trace carries cord ahead of plant zero, so a launch cord was used and the length below is the one measured, not one you typed.
Launch boxes are metric parts — 150 m, 300 m, 500 m, 1 km. The length you enter finds the cord's end connector; its measured position becomes zero.
Reading traces stays free. Pro will add the both-directions view (A→B and B→A as one reading), PDF reports with your job, tech and logo, and whole-folder job summaries.
This reads a trace. It does not certify a link. FOA-4 directs that automatic OTDR analysis not be relied on until a technician has reviewed the trace and confirmed it suits the plant under test. Everything here is a measurement and a ranked set of candidate causes for you to judge.
Readings are indicative and come with no warranty; the instrument's own report remains the record. EXFO is a trademark of EXFO Inc.; Trace Read is not affiliated with or endorsed by EXFO. Telcordia is a trademark of its owner.