DSI Security Systems Inc, Winnipeg DSI Security Systems Inc. owns and operates one of the most advanced central monitoring stations in the industry. Our secure, ULC® Listed central monitoring facility monitors security signals, real-time remote video, medical, environmental, hazardous material, and GPS-based security devices from around the world, all-day, everyday. Prairie Mobile Communications, Winnipeg Prairie Mobile Communications continues to provide complete wireless communications solutions to customers as far away as Australia or as demanding as the Canadian Military. For more than 35 years we have been serving the people, businesses and government agencies throughout the Prairie Provinces of Canada and with your support we have continued to grow and expand into other areas where we can meet the ongoing needs of our customers.