Mitel and Inter-Tel Announce Completion of Merger

August 16, 2007

Mitel and Inter-Tel Announce Completion of Merger

Mitel and Inter-Tel Announce Completion of Merger

"We are delighted to complete our merger with Inter-Tel," said Don Smith, CEO of Mitel. "Inter-Tel’s people, products, managed services and partnerships complement those at Mitel and will enable us to accelerate our growth strategy by extending our small/medium business (SMB) leadership position and continuing our expansion into the large business sector."

The company will now be #1 in the North American SMB market1, #2 in the Western European IP lines shipped2, the overall leader in the U.K. communications market3 and continues to grow its operations globally. With three trusted brands (Mitel, Inter-Tel and Lake), the company offers customers a broad choice of solutions from the very small to the very large, from IP enabled to pure IP unified communications, from standard solutions to tailored, from single site to multi-site and from outright capital purchase options through sophisticated managed services.

“We are extremely pleased to complete this transaction today, which we believe is in the best interests of Inter-Tel stockholders,” said Norman Stout, CEO of Inter-Tel. “Our new company will be a formidable industry player in the U.S. and across the globe, and as part of the Mitel team, we look forward to continuing to provide exceptional products and services to our mutually expanded customer base.”

Mitel will maintain Inter-Tel’s Arizona headquarters, which will become the center of operations for the combined U.S. business and serve as an important center of R&D excellence.

“We have common entrepreneurial roots, a shared vision and the breadth of solutions and technology to address the diverse needs of the rapidly changing communications market.” Don Smith concluded. “As we come together we will deliver innovative solutions and managed services for our existing customers and channel partners, so that no one is stranded or forced to consider an alternate vendor. We intend to be the logical choice for both existing and new customers.”

As a result of the acquisition, Inter-Tel common stock will no longer be listed on the NASDAQ Stock Market as of August 16, 2007.

About Mitel

A global market leader in business communications powering more than two billion business connections, helps businesses and service providers connect, collaborate and provide innovative services to their customers. Our innovation and communications experts serve more than 70 million business users in more than 100 countries. For more information, go to www.mitel.com and follow us on Twitter @Mitel.

Mitel is the registered trademark of Mitel Networks Corporation

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Contact Information

Camille Beasley, Media

Tel: 469-212-0433

Email: camille.beasley@mitel.com

Denise Hogberg, Industry Analysts

Tel: 469-212-0434

Email: denise.hogberg@mitel.com

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