ADTRAN, Inc. engages in the provision of networking and communications equipment. It operates through the Network Solutions and Services and Support business segment. The Network Solutions segment includes hardware products and next-generation virtualized solutions used in service provider or business networks, as well as prior-generation products. The Services and Support segment offers ProCloud managed services, network installation, engineering and maintenance services, and fee-based technical support and equipment repair/replacement plans. The company was founded by Mark C. Smith in November 1985 and is headquartered in Huntsville, AL.