ADTRAN, Inc. (ADTRAN) is a provider of networking and communications equipment. The Company's solutions enable voice, data, video and Internet communications across a range of network infrastructures. It operates through two segments: Network Solutions and Services & Support. Network Solutions includes software and hardware products that enable CSPs and enterprise customers to realize a fully connected world. It provides a full-range of network implementation, maintenance and managed services. Its solutions include Access & Aggregation, Customer Devices, and Traditional & Other Products. Its Access & Aggregation solutions are used by communications service providers (CSPs) to connect their network infrastructure to their subscribers. The portfolio of ADTRAN solutions within Access & Aggregation category includes a range of modular or fixed physical form factors designed to deliver the technology and economic fit based on the target subscriber density and environmental conditions.