TDS: To expand VISI data center capacity in Eden Prairie, Minnesota

$10 million expansion to double power and cooling capacity to provide growth

For more information, contact:

DeAnne Boegli, National Public Relations Manager

TDS Telecommunications Corp.

608.664.4428 / [email protected]

http://www.media.tdstelecom.com

MADISON, Wis. (May 9, 2011)—TDS Telecommunications Corp. (TDS®) announces the start of a $10 million data center infrastructure expansion at its VISI data center in Eden Prairie, Minn. The project, slated to begin this spring, will double the power and cooling capacity of the facility which is already the largest commercially available Tier III data center in the region.

“This expansion will accommodate growth within VISI’s current facility. We will be adding a 3.0 Megawatt generator, evaporative cooling towers for 630 tons of cooling capacity, and three new Uninterrupted Power Systems (UPS) systems,” says Mike Sowada, CEO at VISI. “Additionally, on floor Computer Room Air Conditioners (CRACs) and Power Distribution Units (PDUs) will be added within the data center for power and cooling distribution.”

All of these components will be integrated into the existing data center infrastructure, which will maintain its current N+1 Uptime Institute Tier III Design certification.

“We understand the long term success of our data centers will require investments and we are prepared to maintain our leadership in this growing market,” adds Dave Wittwer, president and CEO TDS Telecommunications Corp.

TDS Telecommunications’ parent company Telephone and Data Systems Inc. of Chicago acquired VISI in March 2010. TDS Telecommunications Corp. in Madison, Wis. has full management responsibility for the VISI data centers located in Minnesota.

“Our goal is to be one step ahead of the growing needs of our customers,” adds Wittwer. “Businesses are outsourcing the management of core IT infrastructure at an accelerated pace. Colocation, cloud computing and disaster recovery needs are creating high demand for secure data center facilities in all our locations throughout the Midwest.”