SYDNEY; July 8, 2008 – Furthering the efforts of their Global Strategic Alliance, Extreme Networks, Inc. (Nasdaq: EXTR) and Avaya Inc. have successfully compliance-tested wired and wireless enterprise VoIP solutions, using Extreme Networks® new Summit® X350 switches, Summit X150 switches, and Summit WM20 wireless local area network (LAN) solutions with Avaya's market-leading IP telephony solutions.

Through Avaya's compliance process, Extreme Networks Summit X350-24t, Summit X150-24p, Summit X150-24t, and Summit X150-48t switch models were successfully tested for interoperability with Avaya Communication Manager IP telephony software, Avaya Media Gateways, and Avaya IP Office, a converged voice and data server for small and mid-sized businesses.

"Our new value-based network edge solutions allow customers to enjoy a full featured edge network and consistent software spanning both core and edge switches,” said Gregory Heath, director of convergence solutions for Extreme Networks. "The Summit X150 and Summit X350 contain highly advanced voice and data convergence capabilities that maintain high quality communications and have now been validated with Avaya's world-class IP telephony solutions.”

Tests demonstrated that the Summit X350 for 10/100/1000BASE-T connectivity and Summit X150 for 10/100BASE-T applications both support and prioritise Avaya IP telephony voice traffic. Further tests validated automated support for IP telephone authentication and the exchange server information to ease the deployment of the communication solution. Power-over-Ethernet (PoE) features were also validated on the supporting switches to demonstrate the unified solution implementation that uses a mix of Avaya telephones using SIP and H.323 protocols.

The Summit WM20 wireless LAN solution was added to the list of compliant Extreme Networks products, having been verified as compliant with the Avaya Communication Manager IP telephony software and with Avaya 3600 series wireless IP phones, featuring standards-based 802.11a/b/g technology for mobile communications.

Extreme Networks products were validated for interoperability through the Avaya DevConnect program – an initiative to promote the development, compliance-testing and co-marketing of innovative third-party products that are compatible with standards-based Avaya solutions. Extreme Networks, a platinum member of the DevConnect program, has successfully achieved compliance on a broad portfolio of core to edge network infrastructure products. Avaya is recommending the Extreme Networks BlackDiamond® and Summit® Ethernet switches to its customers as the Avaya Cajun family of switches approach end-of-sale status.

"With the compliance testing of a wired and wireless converged infrastructure solutions from Extreme Networks, Avaya customers have the opportunity to implement a fully interoperable mobility solution to allow them to maximise their business potential," adds Eric Rossman, vice president, developer relations and technical alliances, Avaya. "They are able to use unified communications to help customers and colleagues connect with employees on the move – staying ahead of their competitors and driving profits for the enterprise."

Extreme Networks, Inc.

Extreme Networks designs, builds, and installs Ethernet infrastructure solutions that help solve the toughest business communications challenges. The company’s commitment to open networking sets us apart from the alternatives by delivering meaningful insight and unprecedented control to applications and services. Extreme Networks believes that openness is the best foundation for growth, freedom, flexibility and choice. The company’s focus on enterprises and service providers who demand high performance, converged networks that support voice, video and data over a wired and wireless infrastructure. For more information, visit: http://www.extremenetworks.com About Avaya Inc.

Avaya delivers Intelligent Communications solutions that help companies transform their businesses to achieve marketplace advantage. More than 1 million businesses worldwide, including more than 90 percent of the FORTUNE 500®, use Avaya solutions for IP Telephony, Unified Communications, Contact Centers and Communications-Enabled Business Processes. Avaya Global Services provides comprehensive service and support for companies, small to large. For more information, visit the Avaya Web site: http://www.avaya.com. For more information on the Avaya DeveloperConnection Program, visit http://www.devconnectprogram.com/.

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Extreme Networks, Summit and BlackDiamond are either registered trademarks or trademarks of Extreme Networks, Inc. in the United States and other countries. All other trademarks are the property of their respective owners. This announcement contains forward-looking statements that involve risks and uncertainties, including statements regarding the performance, speed and availability of the Summit WM Wireless LAN controllers. Actual results could differ materially from those projected in the forward-looking statements as a result of certain risk factors, including, but not limited to product and network configuration. We undertake no obligation to update the forward-looking information in this release. More information about potential factors that could affect our business and financial results is included in our filings with the Securities and Exchange Commission, including, without limitation, under the captions: "Management's Discussion and Analysis of Financial Condition and Results of Operations," and "Risk Factors" (http://www.sec.gov).

For more information

Aaron Condon, Extreme Networks +61.2.8912 2401 or +61 (0) 410 537 006 acondon@extremenetworks.com