Moody's and Standard & Poor's Issue Ratings for Mitel's New US$355 Million Term Loan

Moody's and Standard & Poor's Issue Ratings for Mitel's New US$355 Million
Term Loan

              Moody's Upgrades Mitel's Corporate Rating to "B2"

             Standard & Poor's Maintains Corporate Rating at "B"

OTTAWA, Jan. 10, 2014 (GLOBE NEWSWIRE) -- Mitel® (Nasdaq:MITL) (TSX:MNW), a
leading provider of cloud and software-based unified communications and
collaboration (UCC) solutions, today announced that Moody's and Standard &
Poor's have published their respective ratings of the company's proposed
US$355 million term loan. The debt is being issued in conjunction with the
company's previously announced acquisition of Aastra Technologies and to
refinance existing debt issued by Mitel.

Moody's assigned a "Ba3" rating to the new term debt and upgraded Mitel's
corporate family rating, or CFR, to "B2" from "B3" with a "stable" outlook.

Standard & Poor's issued a "B+" rating to the new credit, assigning it a
Recovery Rating of "2". The agency corporate rating of "B" on Mitel with a
"positive" ratings outlook is unchanged.

Steve Spooner, Chief Financial Officer of Mitel, commented, "We view the
ratings issued for our proposed new credit facility as a strong endorsement of
the decision to combine Mitel and Aastra to become one of our industry's
leading companies. Our ability to integrate quickly and generate the $50
million in synergies we have outlined will enable us to further strengthen the
balance sheet of the billion dollar company this merger creates."

Forward Looking Statements

Some of the statements in this press release are forward-looking statements
(or forward-looking information) within the meaning of applicable U.S. and
Canadian securities laws. These include statements using the words target,
outlook, may, will, should, could, estimate, continue, expect, intend, plan,
predict, potential, project and anticipate, and similar statements which do
not describe the present or provide information about the past. There is no
guarantee that the expected events or expected results will actually occur.
Such statements reflect the current views of management of Mitel and are
subject to a number of risks and uncertainties. These statements are based on
many assumptions and factors, including general economic and market
conditions, industry conditions, corporate approvals, regulatory approvals,
operational factors and other factors. Any changes in such assumptions or
factors could cause actual results to differ materially from current
expectations. All forward-looking statements attributable to Mitel, or persons
acting on its behalf, and are expressly qualified in their entirety by the
cautionary statements set forth in this paragraph. Undue reliance should not
be placed on such statements. In addition, material risks that could cause
results of operations to differ include the merged company's ability to
achieve or sustain profitability in the future; fluctuations in the quarterly
and annual revenues and operating results; fluctuations in foreign exchange
rates; current and ongoing global economic instability; intense competition;
reliance on channel partners for a significant component of sales; dependence
upon a small number of outside contract manufacturers to manufacture products;
the ability to successfully integrate the acquisition and realize certain
synergies; and, our ability to implement and achieve our business strategies
successfully. Additional risks are described under the heading "Risk Factors"
in Mitel's Annual Report on Form 10-K and in Mitel's 10-Q for the six month
period ended October 31, 2013 and filed with the Securities and Exchange
Commission on December 5, 2013. Forward-looking statements speak only as of
the date they are made. Except as required by law, we do not have any
intention or obligation to update or to publicly announce the results of any
revisions to any of the forward-looking statements to reflect actual results,
future events or developments, changes in assumptions or changes in other
factors affecting the forward-looking statements.

About Mitel

Mitel® (Nasdaq:MITL) (TSX:MNW) is a global provider of unified communications
and collaboration (UCC) software, solutions and services that enable
organizations to conduct business anywhere, over any medium with the device of
their choice. Through a single cloud-ready software stream, Mitel's Freedom
architecture provides customers in over 100 countries the flexibility and
simplicity needed to support today's dynamic work environment. For more
information visit www.mitel.com.

Mitel and the Mitel logo are registered trademarks of Mitel Networks
Corporation.

All other trademarks are the property of their respective owners.

MITL-F

CONTACT: Amy MacLeod (media)
         613-592-2122 x71245, amy_macleod@mitel.com
         Malcolm Brown (industry analysts)
         613-592-2122 x71246, malcolm_brown@mitel.com
         Michael McCarthy (investor relations)
         469-574-8134, michael_mccarthy@mitel.com

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