Mitel to Host Analyst Day in Toronto on June 28, 2012

OTTAWA, June 6, 2012 (GLOBE NEWSWIRE)

Mitel (Nasdaq:MITL), a leading provider of Unified Communications and Collaboration (UCC) software solutions, today announced that it will hold its Analyst Day at the TMX Broadcast Centre Gallery in Toronto, ON, Canada on Thursday, June 28, 2012.

Senior members of Mitel's management team will host a series of presentations and a question and answer panel from 8:00 a.m. until 12:00 p.m. Eastern Time. A live audio webcast and replay of the event will be made available on the Investor Relations section of the Company's website at http://investor.mitel.com/.

Space for the event is limited and, therefore, attendance is by invitation only. Analysts and institutional investors interested in attending are encouraged to contact Alice Kousoum at Alice@blueshirtgroup.com to request an invitation.

About Mitel

Mitel Networks (Nasdaq:MITL) is a global provider of business communications solutions and services, consisting of unified communications and collaboration software applications, IP telephony platforms, mobility applications and managed and network services. Mitel enables businesses of all sizes to move beyond basic fixed telephony tools toward integrated multi-media collaboration solutions, accessible from anywhere, helping to improve performance, gain competitive advantage, and reduce costs. Mitel's global headquarters are in Ottawa, Canada, US headquarters are in Chandler, Arizona and EMEA headquarters are in Caldicot, UK, with offices, partners, and resellers worldwide. For more information visit: http://www.mitel.com.

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Contact Information

Amy MacLeod 613-592-2122 x71245 amy_macleod@mitel.com Cynthia Hiponia (investor relations) 613-592-2122 x71997 investorrelations@mitel.com

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