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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.

Medium Dependent Interface (MDI)

The connector used to make the mechanical and electrical interface between a transceiver and a media segment. An 8-pin RJ-45 connector is the MDI for the 10Base-T, 100Base-TX, 100Base-T2, 100Base-T4, and 1000Base-T media systems.

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