With one of its locations in Bloomfield Hills, Mich., Unitel Leasing is part of CTS Companies and specializes in the maintenance, repair and installation of communications systems. CTS Companies serves the telecommunications and office automation industries. It provides network, voice and data products and monitoring, disaster recovery and video surveillance systems. Established in 1980, it also assists in moving people around the office, adding new employees and changing the existing system. The company offers products from Toshiba, AT&T, Ericsson, Airespace and Juniper. CTS Companies additionally maintains locations in Ann Arbor and Kimball, Mich.