ADTRAN, Inc. provides networking and communications platforms, software, and services in the United States, Germany, the United Kingdom, Mexico, and internationally. It operates through two segments, Network Solutions, and Services & Support. The company offers fiber access and fiber to the node platforms; transceivers, cables, and other miscellaneous materials; passive optical network optical line terminals; fiber to the distribution point Gfast distribution point units; cabinet and outside plant enclosures and services; packet optical transports; fixed wireless access platforms; and network management and subscriber services, and control and orchestration software. It also provides broadband customer premises solutions, ethernet switches and routers, residential gateways, cloud-based software-as-a-service management platforms, virtual wireless local area networks, Internet of Things gateways, pre-sale and post-sale technical support, and multi-gigabit mesh Wi-Fi gateways. In addition, the company offers time division multiplexed and asynchronous transfer mode-based aggregation systems and customer devices; and high-bit-rate and asymmetric digital subscriber line, and other technologies. Further, it provides other access and aggregation, subscriber and experience, and traditional and other products, software, and services. Additionally, the company engages in the provision of planning, engineering, program management, maintenance, installation, and commissioning services to implement customer network solutions; and customer devices solutions into consumer, small business, and enterprise locations. It serves telephone or cable television network operators, and managed service providers. ADTRAN, Inc. was incorporated in 1985 and is headquartered in Huntsville, Alabama.