Released on = April 18, 2007, 7:05 am

Press Release Author = ADTRAN, Inc.

Industry = Telecommunications

Press Release Summary = Total Access 5000 Upgrades Otelco to IP

Press Release Body = ADTRAN Flagship Product to Revamp Independent Telco

Total Access 5000 Upgrades Otelco to IP

HUNTSVILLE, Ala.--April 18, 2007--ADTRAN, Inc. (NASDAQ: ADTN), a leading supplier of
next-generation network solutions, today announced that it has signed a letter of
agreement to change the Otelco - Mid-Missouri Division\'s network to full Ethernet
through the ADTRAN Total Access 5000. This will provide the Mid-Missouri Division
with enhanced services and enable it to launch new services like IPTV and Voice over
IP (VoIP) and leverage legacy services across an all IP/Ethernet core.

\"We selected the ADTRAN solution because it supports both IP and legacy services,
allowing for a quick and easy transition to converged networks,\" said Gary Romig,
vice president of the Mid-Missouri Division. \"Strong technology aside, their service
reputation and commitment to this marketplace is something that independent telcos
have rarely seen from the industry\'s technology leaders.\"

\"We recognize many companies use the independents as testing grounds for products
planned for larger facilities. The Total Access 5000 was designed to meet the needs
of independent telephone companies,\" said P. Steven Locke, vice president of sales,
service providers, ADTRAN Carrier Networks Division. \"We are making it very clear
that we are committed long-term to the independent market.\"

The ADTRAN Total Access 5000 is a carrier class multi-service access and aggregation
platform that bridges the gap between existing and next-generation networks. It
supports both legacy and emerging service interfaces over copper and fiber, easily
scaling to support bandwidth intensive applications. The Total Access 5000 provides
a clear migration path for traditional services like voice, but is also designed to
enable new service deployments such as Fiber to the Node (FTTN), Fiber to the
Premises (FTTP), and Ethernet over Copper (EoCu).

About ADTRAN
ADTRAN, Inc. is a leading global provider of networking and communications
equipment, with a portfolio of more than 1,600 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 info@adtran.com. On the Web, visit www.adtran.com.

Web Site = http://www.adtran.com

Contact Details = CONTACT:
ADTRAN, Inc.
Tammie Dodson, 256-963-6739
tammie.dodson@adtran.com