Mitel Sues ShoreTel for Patent Infringement



    Four Mitel U.S. Patents Asserted

    OTTAWA, June 27 /CNW Telbec/ - Mitel Networks Corporation, the trusted
innovator in unified IP communications solutions and applications, today
announced that it has filed a lawsuit against ShoreTel Inc. in the U.S.
District Court for the Eastern District of Texas, alleging infringement of
four Mitel(R) patents - U.S. Patent Nos. 5,940,834, 5,703,942, 5,541,983, and
5,657,446.
    "Mitel has invested significant resources into intellectual property in
support of its communications innovations, and we intend to assert our rights
against those that infringe that intellectual property," said Christian
Szpilfogel, Office of the CTO, Mitel.
    Innovation has been at the heart of Mitel's strategy of developing one of
the industry's leading unified IP communications solutions and product
portfolios. Mitel has hundreds of patents and pending applications in the
United States, Canada and Europe, and in other countries around the world. The
company has been and continues to be recognized for leadership and innovation,
earning numerous industry awards.
    Mitel has retained the services of Fish & Richardson P.C., a national law
firm with offices in Atlanta, Austin, Boston, Dallas, Delaware, New York, San
Diego, Silicon Valley, Twin Cities, and Washington, DC.

    About Mitel

    Mitel, a leading provider of unifying IP communications solutions and
applications for business customers, is headquartered in Ottawa, Canada, with
offices, partners and resellers worldwide. For more information, please visit
www.mitel.com.

    Mitel and logo are registered trademarks of Mitel Networks Corporation.




For further information:

For further information: Paul Goyette, (613) 592-2122 x2188,
paul_goyette@mitel.com (media, industry analysts and investors)

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MITEL NETWORKS CORPORATION

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