Telephone and Data Systems Inc., parent company of TDS Telecommunications Corp., announced the acquisition of Vital Support Systems LLC, based in Des Moines, for a purchase price of $45 million.

Vital generated annual revenues of $76 million in 2011. The acquisition brings additional information technology capabilities and strong customer relationships to the portfolio of TDS Hosted & Managed Services LLC, a wholly owned subsidiary of Telephone and Data Systems, the companies said in a release.

TDS Telecommunications Corp. is the seventh-largest telecom provider in the country. The company provides high-speed Internet, telephone and television entertainment services in hundreds of rural, suburbanand metropolitan communities across 31 states.