Pro-Tech Cabling Systems Inc., 1805 E Maple Rd, Clare, MI 48617, US

Based in Bridgeport, Mich., I.T.I. Inc. specializes in providing telephone equipment and supplies as well as telecommunications and Internet services. The company has been operational since 1966, offering a wide range of products and services, such as telephone systems, local area networks, structured cable systems, paging and intercom systems, auto attendant, voice mail, unified messaging, call accounting, internet services and many more. I.T.I. Inc. caters to the needs of federal, state and municipal governments, school districts and hospitals.