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Reading an OTDR trace.

Also written OTDR graph, Event trace, Optical time-domain reflectometer trace.

How do you read an OTDR trace?

An OTDR trace is the graph an optical time-domain reflectometer draws: distance along the bottom, loss down the side. Each event has a shape: a fusion splice is a small step with no spike, a connector is a spike then a step, and a break is a spike that falls away to nothing. Read the shape before the number, and keep the first trace to compare against later.

Defined by IEC 61746, which governs the calibration of the instrument that draws the trace, published by IEC.

OTDR Tester (OFP-100-Q), a Reading an OTDR trace part supplied by Data Systems
Reading an OTDR trace in the catalogue: OTDR Tester (OFP-100-Q), OFP-100-Q. Catalogue illustration.

Published by Data Systems, network material suppliers in Secunderabad, Hyderabad since 1984, which is forty years of experience with these parts. Written from the standards named above. Last checked 2026-08-14. How we check this, and what we got wrong.

Data Systems, a network material supplier in Secunderabad, Hyderabad since 1984 with branches in Vijayawada and Visakhapatnam, supplies Reading an OTDR trace across India through official channels. Send a list, get one quote.

OTDR Tester

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