ADTRAN, Inc. is a provider of telecommunications networking equipment and internetworking products.
Its headquarters

Headquarters

Headquarters denotes the location where most, if not all, of the important functions of an organization are coordinated. In the United States, the corporate headquarters represents the entity at the center or the top of a corporation taking full responsibility managing all business activities...

 are in Huntsville

Huntsville, Alabama

Huntsville is a city located primarily in Madison County in the central part of the far northern region of the U.S. state of Alabama. Huntsville is the county seat of Madison County. The city extends west into neighboring Limestone County. Huntsville's population was 180,105 as of the 2010 Census....

, Alabama

Alabama

Alabama is a state located in the southeastern region of the United States. It is bordered by Tennessee to the north, Georgia to the east, Florida and the Gulf of Mexico to the south, and Mississippi to the west. Alabama ranks 30th in total land area and ranks second in the size of its inland...

.

The company is ISO 9001 and TL9000 certified.
ADTRAN was a NASDAQ-100

NASDAQ-100

The NASDAQ-100 is a stock market index of 100 of the largest non-financial companies listed on the NASDAQ. It is a modified capitalization-weighted index. The companies' weights in the index are based on their market capitalizations, with certain rules capping the influence of the largest components...

 Index stock from 1996 to 1998.
It was #85 on BusinessWeek

BusinessWeek

Bloomberg Businessweek, commonly and formerly known as BusinessWeek, is a weekly business magazine published by Bloomberg L.P. It is currently headquartered in New York City.- History :...

's 100 "Hot Growth Companies" list in 2006.

Corporate History

ADTRAN was founded by Mark C. Smith

Mark C. Smith

Mark C. Smith was the founder and chief executive officer of ADTRAN.-Early life and education:While still in high school, Smith won a science fair at age 16 and met renowned rocket scientist Wernher Von Braun in Huntsville, Alabama. He received an electrical engineering degree from Georgia Tech in...

 and Lonnie McMillian, and began operations in 1986.
The AT&T divestiture of the Regional Bell Operating Companies (RBOCs), 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

Local loop

In telephony, the local loop is the physical link or circuit that connects from the demarcation point of the customer premises to the edge of the carrier or telecommunications service provider's network...

 access and deployment products for fiber, DS3, T1/E1, wireless T1/E1, Digital Subscriber Line

Digital Subscriber Line

Digital subscriber line is a family of technologies that provides digital data transmission over the wires of a local telephone network. DSL originally stood for digital subscriber loop. In telecommunications marketing, the term DSL is widely understood to mean Asymmetric Digital Subscriber Line ,...

 (HDSL, HDSL2

HDSL2

HDSL2 is the 2nd generation of HDSL with a 6dB Noise Margin, put simply it is another way to provision a T-1 line, only this technology relies on fewer wires - two instead of four - and therefore costs less to set up....

, HDSL4, SDSL

Symmetric Digital Subscriber Line

Symmetric digital subscriber line can have two meanings:* In the wider sense it is a collection of Internet access technologies based on DSL that offer symmetric bandwidth upstream and downstream...

, SHDSL), Frame Relay

Frame relay

Frame Relay is a standardized wide area network technology that specifies the physical and logical link layers of digital telecommunications channels using a packet switching methodology...

, Asynchronous Transfer Mode

Asynchronous Transfer Mode

Asynchronous Transfer Mode is a standard switching technique designed to unify telecommunication and computer networks. It uses asynchronous time-division multiplexing, and it encodes data into small, fixed-sized cells. This differs from approaches such as the Internet Protocol or Ethernet that...

 (ATM), Integrated Services Digital Network

Integrated Services Digital Network

Integrated Services Digital Network is a set of communications standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network...

(ISDN), and Digital Data Service (DDS) digital services.
ADTRAN supplies multiservice access platforms and Integrated Access Devices (IADs) for converged voice and data networks.

According to Computer Business Review, Adtran has enhanced its portfolio of carrier ethernet products with the addition of three new multiservice modular routers supporting a services-enabled sustained throughput of up to 250Mbps.