[February 13, 2012]

ADTRAN's Virtual Wireless LAN Secures 2011 INTERNET TELEPHONY Product of the Year Award

ADTRAN^®, Inc., (NASDAQ:ADTN), a leading provider of next-generation networking solutions, today announced that TMC (News - Alert), a global, integrated media company, has named ADTRAN's virtualized wireless LAN (vWLAN^®) as a recipient of the 2011 INTERNET TELEPHONY Product of the Year Award. ADTRAN's (News - Alert) vWLAN is the only solution to provide wireless LAN control through a VMware^®-ready application and was recognized as one of 2011's finest innovations in the VoIP and IP communications industry. The ground-breaking solution enables both enterprises and large campuses to unlock unprecedented scalability, unmatched reliability, and advanced cloud control by leveraging virtualization.

Deploying VoIP onto the Wi-Fi infrastructure has created scale challenges for the enterprise. Specifically, adding mobile devices to the network along with existing devices often pushes conventional controller-based systems beyond their user count limit. When VoIP moves to the Wi-Fi infrastructure, coverage needs to be improved so that a signal is sustained as a user moves through the enterprise. That means more access points. Again, the enterprise often hits the access point limitation of a conventional controller-based solution. Finally, users have a tendency to move across a building and even across the campus. If these calls are using the Wi-Fi infrastructure, the mobility domain cannot have seams because these seams tend to cause dropped calls. A wireless network built on multiple physical controllers imposes seams and creates small mobility domains.

"The enterprise wireless network has become part of the VoIP infrastructure and this has presented several challenges," said Chris Koeneman, Vice President of Sales and Marketing, Bluesocket (News - Alert) Business Group of ADTRAN. "Not only does the WLAN have to support mobility, but it has to cost effectively scale to support many more mobile devices and have the ability to create vast mobility domains. By leveraging the power of virtualization, ADTRAN's vWLANachieves the scale necessary to effectively support VoIP over the enterprise wireless network. Combined with ADTRAN's LAN and Unified Communications (News - Alert) portfolios, vWLAN provides the most reliable and scalable wireless solution that can be extended to both wired and wireless users of voice, data, and video services."

Along with scale, VoIP over Wi-Fi demands high reliability. vWLAN achieves greater reliability by separating the user's call from the control information about the call. Even if there is an interruption in the control information, the user's call is not interrupted. With conventional controller-based solutions, an interruption in the control plane means a dropped call.

Delivering a consistent level of service for VoIP can be a challenge, particularly for a distributed enterprise with multiple locations. vWLAN solves this problem by supporting centralized control in the data center. vWLAN can operate as a private or public cloud solution. Control and management is liberated from the LAN as an access point anywhere in the networked world can be part of a vWLAN solution. vWLAN can even support layer 3 roaming for users entering the network from third party access points. This level of flexibility allows for consistent VOIP service across separate Wi-Fi networks.

"I am happy to grant ADTRAN with a Product of the Year Award. The editors of INTERNET TELEPHONY have verified that vWLAN displays quality and innovation plus provides real solutions in the marketplace," stated Rich Tehrani, CEO, TMC. "I would like to congratulate the entire team at ADTRAN for their commitment to advancing IP communication technologies."

2011 Product of the Year winners are published in the January/February 2012 issue of INTERNET TELEPHONY magazine.

About INTERNET TELEPHONY magazine

INTERNET TELEPHONY has been the IP Communications Authority since 1998™. Beginning with the first issue in February of 1998, INTERNET TELEPHONY magazine has been providing unbiased views of the complicated converged communications space. For more information, please visit www.itmag.com.

About TMC

TMC is a global, integrated media company that helps clients build communities in print, in person, and online. TMC publishes the Customer Interaction Solutions, INTERNET TELEPHONY, Next Gen Mobility and Cloud Computing (formerly InfoTECH Spotlight) magazines. TMCnet.com, which is read by two million unique visitors each month, is the leading source of news and articles for the communications and technology industries. TMC is the producer of ITEXPO (News - Alert), the world's leading B2B communications event. In addition, TMC runs multiple industry events: 4G Wireless Evolution; M2M Evolution; Cloud Communications Expo; SIP Tutorial 2.0:Bringing SIP to the Web; Business Video Expo; Regulatory 2.0 Workshop; DevCon5; HTML5 Summit; CVx; AstriCon; StartupCamp; MSPAlliance MSPWorld and more. Visit TMC Events for a complete listing and further information. For more information about TMC, visit www.tmcnet.com.

About ADTRAN

ADTRAN, Inc. is a leading global provider of networking and communications equipment, with a portfolio of more than 1,700 solutions. ADTRAN's products enable voice, data, video and Internet communications across a variety of network infrastructures. ADTRAN solutions are currently in use by service providers, private enterprises, government organizations, and millions of individual users 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.

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