ADTRAN, Inc. is a provider of telecommunications networking equipment and internetworking products. Its headquarters are in Huntsville, Alabama. The company is ISO 9001 and TL9000 certified. ADTRAN was a NASDAQ-100 Index stock from 1996 to 1998. It was #85 on BusinessWeek's 100 "Hot Growth Companies" list in 2006. ADTRAN was founded by Mark C. Smith and Lonnie McMillian, and began operations in 1986. The AT&T divestiture of the Regional Bell Operating Companies , with restrictions that effectively barred their manufacturing of equipment, created an opportunity for companies such as ADTRAN... to supply network equipment, both to the seven RBOCs and the new and independent telephone companies in the United States. ADTRAN adapted telephony technology for use in enterprise wide area networks. ADTRAN has become a supplier of local loop access and deployment products for fiber, DS3, T1/E1, wireless T1/E1, Digital Subscriber Line , Frame Relay, Asynchronous Transfer Mode , Integrated Services Digital Network , and Digital Data Service digital services.
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| NASDAQ symbol: | ADTN |
| Founded: | 1986 |
| Headquarters: | Huntsville, Alabama |
| Legal structure: | Public company |
| Annual revenue: | $500,680,000 |
| Net income: | $78,580,000 |
| Operating income: | $113,800,000 |
| Market cap: | $1,500,000,000 |
| Industries: | Telephone and Telegraph Apparatus |