ADTRAN, Inc. to Present at the Lehman Brothers 2006 Worldwide Wireless, Wireline and Media Conference, May 23, 2006.

HUNTSVILLE, Ala. -- ADTRAN, Inc. (NASDAQ: ADTN), will present at the Lehman Brothers 2006 Worldwide Wireless, Wireline and Media Conference in New York, New York on May 23, 2006 at 10:30 a.m. Eastern Standard Time. This presentation can be accessed at ADTRAN's web site at www.adtran.com by selecting the "Investor Relations" link.

About ADTRAN, Inc.

ADTRAN, Inc. is a leading global provider of networking and communications equipment, with an 18-year history of profitability and a portfolio of more than 1,400 solutions for use in the last mile of today's telecommunications networks. Widely deployed by carriers and enterprises alike, ADTRAN solutions enable voice, data, video, and Internet communications across copper, fiber, and wireless network infrastructures. ADTRAN solutions are currently in use by every major U.S. service provider and many global ones, as well as by thousands of public, private and governmental organizations worldwide.

For more information, contact the company at 800 9ADTRAN (800 923-8726) or via email at [e-mail]. On the web, visit www.adtran.com.