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ADTRAN, Inc. supplies innovative network access products that enable today's widespread digital telecommunications applications, including Internet access, telecommuting, corporate connectivity, distance learning, video-conferencing, and teleradiology.

Incorporated in 1985, ADTRAN began operations in 1986 following AT&T's divestiture of the Regional Bell Operating Companies (RBOCs) with restrictions that effectively barred their manufacturing of equipment. These events created an opportunity for companies such as ADTRAN to supply network equipment to the seven RBOCs as well as more than 1,300 independent telephone companies in the United States.

With over three million ADTRAN-based local loops operating worldwide, ADTRAN has become a leading supplier of local loop access and deployment products for fiber, DS3, T1/E1, wireless T1/E1, Digital Subscriber Line (HDSL, HDSL2, HDSL4, SDSL, SHDSL), Frame Relay, Asynchronous Transfer Mode (ATM), Integrated Services Digital Network (ISDN), and Digital Data Service (DDS) digital services.