Exclusive Membership Program and Expanded SIP Center of
     Excellence Designed to Simplify Integration and Resale of
                  Strategic Third-Party Solutions

OTTAWA, Ontario, June 7, 2012 (GLOBE NEWSWIRE) -- Mitel(R)
(Nasdaq:MITL), a leading provider of Unified Communications and
Collaboration (UCC) software solutions, has today extended the value of
its advanced communications portfolio with enhancements to the Mitel
Solutions Alliance (MSA) developer partner program. The launch of an
exclusive Mitel Platinum Preferred (MPP) member level and expansion of
its SIP Center of Excellence aims to propel development of
sophisticated new capabilities and functionality and accelerate
time-to-market for strategic solutions that deliver value to Mitel
customers and channel partners.

The MSA program provides resources, support and channel visibility to
third-party partners (3PPs) worldwide so they can create high
revenue-generating and productivity-enhancing applications and services
that integrate and interoperate with Mitel's Freedom architecture.
Mitel is now identifying the most strategic third-party solutions for
exclusive MPP designation, which offers extensive collaboration and
go-to-market support. The 3PPs and Mitel sales channels benefit from a
"one-stop shop" for pre-integrated solution quoting and ordering.

Mitel has also enhanced and expanded its Interoperability Certification
and SIP Center of Excellence labs in support of the Mitel Interop
Certification Program. These teams work with MSA partners to validate
integration and functionality of 3PP solutions with Mitel core products
using Mitel APIs, protocols or interfaces. Pre-validation helps
maximize the quality and reliability of integrated solutions and
minimize the amount of support required by Mitel and its resellers.

"The MSA program already includes more than 160 innovative development
partners and we are acquiring new advanced application and solution
partners to enhance the business value of our solutions portfolio,"
said Ron Wellard, executive vice president and general manager of Mitel
Communications Solutions. "Our market leadership makes this program
attractive for third-party developers, as they can benefit from
accelerated time-to-market for their solutions and increased exposure
to our channel partners and global customer base."

Find out more about the Mitel Solutions Alliance program.

About Mitel

Mitel (Nasdaq:MITL) is a global provider of business communications and
collaboration software and services. Mitel's Freedom architecture
provides the flexibility and simplicity organizations need to support
today's dynamic work environment. Through a single cloud-ready software
stream, Mitel delivers a powerful suite of advanced communications and
collaboration capabilities that provides freedom from walled garden
architectures and enables organizations to implement best-of-breed
solutions on any network; extends the "in-office" experience anywhere,
on any device; and offers choice of commercial options to fit business
needs. For more information, visit: http://www.mitel.com

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CONTACT: Amy MacLeod (media)
         613-592-2122 x71245
         amy_macleod@mitel.com
         
         Malcolm Brown (industry analysts)
         613-592-2122 x71246
         malcolm_brown@mitel.com
         
         Cynthia Hiponia (investor relations)
         613-592-2122 x71992
         investorrelations@mitel.com