Released on = April 23, 2007, 8:43 am

Press Release Author = Kristen Keller

Industry = Telecommunications

Press Release Summary = Selection of Flagship Platform Gives Service Providers
Competitive Advantage for Legacy and Next-Generation Services

Press Release Body = HUNTSVILLE, Ala., Apr 23, 2007 - ADTRAN®, Inc., (NASDAQ: ADTN),
a leading supplier of next-generation network solutions, today announced that
Horizon Chillicothe Telephone Company, ATC, and Citizens-Brevard Telephone have
selected ADTRAN\'s Total Access(R) 5000 Multi-Service Access and Aggregation Platform
for deployment in their networks. The Total Access 5000 provides a competitive
advantage for carriers of all sizes, by allowing them to use existing infrastructure
in support of both legacy and next-generation services.

\"The ADTRAN Total Access 5000 was the most economical solution for ATC. We wanted a
solution that could offer 100 percent DSL/POTS and ADTRAN delivered,\" stated Kevin
Eason, manager of Network Operations for ATC. \"This will reduce both OPEX and CAPEX
on our future DSL deployments. We look forward to adding additional Total Access
5000s and replacing our embedded base of legacy DLCs.\"

\"The Total Access 5000 is now being accepted as the next generation Broadband DLC
for fiber and copper delivery connectivity in new networks,\" said P. Steven Locke,
vice president of sales, service providers, ADTRAN Carrier Networks Division. \"Not
only does the Total Access 5000 allow Independent telephone companies to move to new
Ethernet service applications, but it also enables service migration in existing ATM
networks.\"

\"We needed an IP-based solution that would support both legacy T1 and GR-303 as well
as new IPTV and GPON services in a scalable platform,\" said Paul Wooldridge, Network
Design Engineer, Horizon Chillicothe Telephone Company. \"When you combine the
system\'s scalability with a 10-year warranty and ADTRAN\'s outstanding customer
support the Total Access 5000 Multi-Service Access and Aggregation Platform was a
perfect fit.\"

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 ATC

ATC is a wholly owned subsidiary of the Alma Telephone Company, with offices located
throughout the Southeast. ATC provides local dial-up Internet access for Ware,
Pierce, Coffee, Bacon, Irwin, Atkinson, Wayne, Toombs, Montgomery, Glynn, Chatham
and the surrounding areas in Southeast Georgia. Recently, ATC has installed more
than 200 miles of fiber-optic lines in this same area to bring modern communication
services to its customers. ATC also provides high-speed DSL (digital subscriber
lines) in all service territories for faster and more efficient Internet
communications. ATC has been leading the way in cutting-edge technology for over 60
years.

About Horizon Chillicothe Telephone
Chillicothe Telephone, a division of Horizon Telcom, has more than 36,000 access
lines in the Chillicothe, Ohio area. Horizon has provided the communication needs of
this community for 110 years. Chillicothe Telephone\'s corporate offices are located
at 68 East Main St. in Chillicothe, and provide a wide range of custom services
throughout the Ross County area. Services include basic telephone service, long
distance, Horizon View digital cable TV, high-speed and dial-up Internet access,
business systems, audio visual sales and service.

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://

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