services from their equipment to customer's premises. Its products enable various services, such as voice services, VoIP, IP television, RF video, high speed Internet access, and data services based upon Ethernet, frame relay, TDM, and ATM networks, connecting the network with user components, such as switches, routers, gateways, IADs, PBX, and telephone key systems. This division serves incumbent local exchange carriers, independent operating companies, competitive local exchange carriers, utilities, municipalities, cable MSOs, international carriers, and wireless service providers. ADTRAN's Enterprise Networks division specializes in Internetworking solutions to construct voice, data, and video networks over wide and local area networks. These solutions are installed in equipment rooms and wiring closets to connect headquarters, branch offices, and telecommuters to corporate voice and data infrastructure. It also offers multi-service routers, managed layer 2/3 switches, IP business gateways, FTTx ONTs, wireless access points, IP PBXs, IP phones, and unified communications solutions. This division serves retail, food service, healthcare, finance, government, education, manufacturing, military, transportation, hospitality, energy, and utility markets. In addition, the company provides digital data service and integrated services digital network, digital network products, high bit-rate digital subscriber line products, time division multiplexed-symmetrical HDSL products, channel service units/data service units, and fixed wireless products. ADTRAN, Inc. was founded in 1985 and is headquartered in Huntsville, Alabama.