EXFO Inc., set up in 1985 by Germain Lamonde in Quebec City, Canada, is a global leader in test, monitoring, and analytics offerings for the communications industry. Specializing in fiber optic and network testing, EXFO supplies OTDRs (e.g., AXS-115), fiber inspection probes (FIP-500), and 800G test platforms (FTBx-88800) for 5G, FTTx, and data center applications. Operating in over 100 countries with ~1,800 employees, it serves network operators, hyperscalers, and research sectors. Acquired by VIAVI offerings in August 2021, EXFO remains a key player in 400G/800G testing and Industry 4.0 offerings. Its iOLM technology and cloud-native RFTM platform enhance automation and diagnostics. Recent innovations include the BA-1600 1.6T Bit Analyzer and iOptics for transceiver validation.