Definitive Additional Materials

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Inter-Tel (Delaware), Incorporated

 


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On June 29, 2007, Inter-Tel (Delaware), Incorporated issued a press release announcing that the Special Meeting of Stockholders to vote on the merger with Mitel Networks Corporation, which was originally scheduled for June 29, 2007, has been postponed. The new date, time and location for the meeting will be announced early next week.

A copy of the press release follows:

LOGO

1615 SOUTH 52nd STREET, TEMPE, ARIZONA (480) 449-8900 FAX (480) 449-8929

NEWS RELEASE

 

For Release

   June 29, 2007   

Contact

   (480) 449-8900    (212) 355-4449
   Norman Stout    Steve Frankel / Jennifer Friedman
   Inter-Tel Chief Executive Officer    Joele Frank, Wilkinson Brimmer Katcher

INTER-TEL POSTPONES SPECIAL MEETING REGARDING

MITEL MERGER

TEMPE, AZ, June 29, 2007 – Inter-Tel (Delaware), Incorporated (NASDAQ: INTL) announced today that the Special Meeting of Stockholders to vote on the merger with Mitel Networks Corporation, which had been scheduled for June 29, 2007, has been postponed. The new date, time and location for the meeting will be announced early next week.

Alexander L. Cappello, the Chairman of the Special Committee of Inter-Tel’s Board of Directors said, “After careful consideration, the Special Committee has decided to postpone the vote on the Mitel merger so that all Inter-Tel stockholders can evaluate recent developments when deciding how to vote their shares. We believe stockholders should have the opportunity to consider the significant recent changes in the debt capital markets adversely affecting the availability and cost of financing for acquisition or recapitalization transactions and the disclosure in Steven G. Mihaylo’s definitive proxy statement, which has only recently become available. In addition, given that the second quarter is concluding, the Special Committee believes that Inter-Tel stockholders should have the benefit of an update regarding the Company’s preliminary second quarter sales results, which the Company expects to announce at the end of next week.

Mr. Cappello, continued, “We also believe it is vital that stockholders consider the letter we recently received from Mitel Networks Corporation informing us that Mitel cannot increase the purchase price in its merger agreement, and the reasons they stated for that decision. In addition, the Special Committee believes it is important to note that there have been significant changes in Inter-Tel’s stockholder base since the record date for the special meeting, and that no other bidder has made a proposal to acquire the Company.”

Stockholders with questions or who need assistance in voting their shares may call the Company’s proxy solicitor, Innisfree M&A Incorporated, toll-free at 888-750-5834 (banks and brokers may call collect at 212-750-5833).


About Inter-Tel (Delaware), Incorporated

Inter-Tel (Nasdaq: INTL) offers value-driven communications products; applications utilizing networks and server-based communications software; and a wide range of managed services that include voice and data network design and traffic provisioning, custom application development, and financial solutions packages. An industry-leading provider focused on the communication needs of business enterprises, Inter-Tel employs approximately 1,940 communications professionals, and services business customers through a network of 57 company-owned, direct sales offices and approximately 300 authorized providers in North America, the United Kingdom, Ireland, Australia and South Africa. More information is available at www.inter-tel.com.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, concerning the pending acquisition of Inter-Tel by Mitel and the leveraged recapitalization strategy proposed by Mr. Mihaylo, among other things. Forward-looking statements are statements in the future tense or that include words such as “intends,” “believe”, “expect”, “proposed”, “anticipates” and words of similar import.

Forward-looking statements are based on assumptions, suppositions and uncertainties, as well as on management’s best possible evaluation of future events. However, actual results may differ materially from those reflected in forward-looking statements based on a number of factors, many of which are beyond the control of Inter-Tel. Such factors may include, without excluding other considerations, fluctuations in quarterly results, evolution in customer demand for Inter-Tel’s products and services, risks associated with the proposed acquisition by Mitel or the outcome of any discussions with or actions by Mr. Mihaylo, the impact of price pressures exerted by competitors, and general market trends or economic changes.

Additional Information

In connection with the pending Mitel merger, Inter-Tel filed a definitive proxy statement with the Securities and Exchange Commission on May 29, 2007. INVESTORS AND SECURITY HOLDERS ARE ADVISED TO READ THE DEFINITIVE PROXY STATEMENT AND ANY AMENDMENTS OR SUPPLEMENTS THERETO BECAUSE THEY CONTAIN, OR WILL CONTAIN, IMPORTANT INFORMATION. Copies of the definitive proxy statement and other documents filed by Inter-Tel can be obtained without charge at the Securities and Exchange Commission’s web site at www.sec.gov or from Inter-Tel by contacting Inter-Tel (Delaware), Incorporated, Attention: Investor Relations, 1615 S. 52nd Street, Tempe, AZ 85281, Telephone: 480-449-8900.

Inter-Tel and its directors, officers and employees may be deemed to be participants in the solicitation of proxies from its stockholders in connection with the proposed merger with Mitel. Information concerning the interests of Inter-Tel’s participants in the solicitation is included in the definitive proxy statement.

Inter-Tel and the Inter-Tel logo are trademarks of Inter-Tel (Delaware), Incorporated.

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