Consolidated Communications Holdings, Inc., together with its subsidiaries, provides telecommunications services to residential and business customers in Illinois, Texas, and Pennsylvania. Its telecommunications services include local and long-distance services, high-speed broadband Internet access, standard and high-definition digital television, digital telephone services, custom calling features, private line services, carrier access services, network capacity services over its regional fiber optic network, and competitive local exchange carrier (CLEC) services. The company also offers telephone directory publishing services, wholesale transport services on its fiber-optic network in Texas, billing and collection services, inside wiring services, and maintenance services. In addition, it provides automated calling services for correctional facilities; and sells and supports telecommunications equipment, such as key, private branch exchange, and IP-based telephone systems to business customers in Texas and Illinois. The company serves residential customers, and universities and hospitals, as well as retail, commercial, light manufacturing, and service industry accounts in Illinois; manufacturing and retail industries, hospitals, local governments, and school districts in Texas; and small to mid-sized businesses, educational institutions, and healthcare facilities in Pennsylvania. As of December 31, 2011, it had 227,992 local access lines, 110,913 digital subscriber lines, 34,356 Internet protocol digital television subscribers, 9,199 voice over Internet protocol, and 89,774 CLEC access line equivalents. The company was founded in 1894 and is headquartered in Mattoon, Illinois.