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COVID-19: As a designated essential telecom solutions provider, EXFO remains fully operational with our employees' health and safety as our top priority.

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Glossary

Technology evolves at a rapid-fire pace. That’s why we’ve built an easy-to-use glossary to help you better understand the terms, technologies and trends that impact your business.

Backscatter

The portion of Rayleigh scattered light that returns directly to the source. Backscatter light levels are measured by an OTDR to determine optical power, distance, splice loss and reflection.

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