ADTRAN, Inc. designs, manufactures, markets and services network access solutions for communications networks. The Company major product categories are Carrier Systems, Business Networking and Loop Access. It operates to two divisions: the Carrier Networks Division and the Enterprise Networks Division. Carrier Networks Division provides products and services used by service providers to deliver voice, data and video services to their customers' premises and to mobile network cell sites. These products are located in central exchange offices or remote terminals, serving area interconnect locations and cell site locations for mobile networks. Enterprise Networks Division provides products and services used by enterprise customers to construct voice, data and video networks within the customer's site or among distributed sites. Its product portfolio consists of approximately 1,800 high-speed network access and communication devices. In August 2011, the Company acquired Bluesocket.