|Founded||Windsor, Ontario, Canada
(September 1995 )
|Headquarters||3363 Tecumseh Road East
Windsor, Ontario, Canada
|Products||Digital subscriber line,
Managed Network Systems Inc. (doing business as MNSi Telecom) is a Canadian Internet service provider (ISP) and phone provider located in Windsor, Ontario. Opened in 1995, it is the oldest ISP in the Windsor-London area, having started in September of that year as a provider of Dial-up Internet access.
The company serves customers in the city, providing home and business phone, long distance, DSL Internet and fibre. MNSi also serves nearby areas of Southern Ontario, including Chatham, Ontario, Leamington, Ontario, LaSalle, Ontario, Tecumseh, Ontario London, Ontario and Sarnia, Ontario.
In 2017, MNSi became a sister company with Central Ontario communications company Nexicom. In November, 2016, Nexicom received The Outstanding Business Achievement Award by The Kawartha Chamber of Commerce and Tourism.
Introduction to fibre
In 2012 the company started planning and digging for fibre delivery to Windsor  with a gradual roll-out of upgrades through to 2020. It will be an expected investment of more than $35 million. The service is available in Walkerville, Oldcastle and East Windsor.
- "Karl Moher is Kawartha Chamber’s Citizen of the Year", Kawartha Now, November 5, 2016
- Ellen van Wageningen, "Internet provider gets boost from phone service", Windsor Star, September 13, 2012
- "Windsor Internet users can now experience the city’s fastest fibre optic connections", WeTech Alliance, November 30, 2016
- MNSi Spending $35 million On High-Speed Internet Windsorite, November 30, 2016