EXFO is a company that designs and manufactures test instruments and service assurance products for fixed and mobile telecom networks. Its products include optical, transport, datacom, 3G, LTE, copper, xDSL, IMS and VoIP test platforms used by network operators and network equipment manufacturers to assess telecom infrastructure and the telecom services carried on it., EXFO is headquartered in Quebec City, Quebec, Canada, and has over 1200 employees worldwide., EXFO was founded in 1985 in Quebec City by Germain Lamonde and Robert Tremblay. Its original products were portable testing products for optical networks. In 1996, EXFO started designing products for optical component and optical system research and development and manufacturing. The company has since added 3G, LTE, protocol, copper/xDSL, IMS, and VoIP test and service assurance products, mainly through acquisitions.