SDN Communications is the region's premier business-to-business broadband service provider. It has the most extensive fiber-o ... ptic network in the area, moving voice, data, internet and video over a 50,000-mile fiber-optic network. Businesses with multiple locations, such as hospitals, banks, schools and government agencies, use SDN for: Connectivity - for multiple-location offices Internet - Dedicated service for businesses Managed Services – Managed Firewalls, Routers, and DDoS Protection. SDN’s network is made up of its 17 owner companies – South Dakota’s independent telephone companies. For more information call 1-800-247-1442 or visit www.sdncommunications.com. read more