Exhibit 2.17
 FIFTH AMENDMENT TO FIRST LIEN CREDIT AGREEMENT
 Amendment MNI Holdings U.S.
Borrower U.S.
Borrowers Canadian Borrower Borrower Borrowers Article I  U.S.
Administrative Agent
 WITNESSETH
 Existing Credit Agreement Credit Agreement
     Certain Definitions
 Amendment preamble
 Amendment Effective Date Article III
 Borrower preamble
 Credit Agreement first recital
 Existing Credit Agreement first recital




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Defined Terms Generally
    Consolidated EBITDA provided clause
(y) clause (b)(viii) minus
  Excess Cash Flow
  over
 clause (c) Section 3.1.1 Section 3.1.1
 2




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clauses (iv) (vi) (vii)
   Conditions to Effectiveness Amendment Effective Date
 Counterparts
 Certificate of Authorized Officer
 Obligor Acknowledgment and Consent
 Legal Matters
 Payment of Expenses
 3




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Representations and Warranties, No Event of Default
 Due Authorization, Non-Contravention, etc.
 Government Approval, Regulation, etc
 Validity, etc
 4




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Continued Effectiveness of Credit Agreement
   Counterparts
 Cross-References
 Governing Law
 Loan Document Pursuant to Credit Agreement
 No Waiver
 5




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Successors and Assigns
 Fees and Expenses
 WAIVER OF JURY TRIAL
 6




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WILMINGTON TRUST FSB, as
Administrative Agent and as a LenderBy:
    /s/ James A. HanleyName:
    James A. HanleyTitle:
    Vice President Signature Page to Fifth Amendment to Credit Agreement




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SPECIAL VALUE CONTINUATION PARTNERS, LP,
    
    
    
    Principal Amount of Loans:as a Lender
    
    
    
    $19,839,674.14By:
    
    TENNENBAUM CAPITAL PARTNERS, LLCIts:
    
    Investment ManagerBy:
    
    /s/ Rajneesh VigName: Rajneesh VigTitle: PartnerSPECIAL VALUE OPPORTUNITIES FUND, LLC,
    
    
    
    Principal Amount of Loans:as a Lender
    
    
    
    $34,042,932.31By:
    
    TENNENBAUM CAPITAL PARTNERS, LLCIts:
    
    Investment ManagerBy:
    
    /s/ Rajneesh VigName: Rajneesh VigTitle: PartnerSPECIAL VALUE EXPANSION FUND, LLC,
    
    
    
    Principal Amount of Loans:as a Lender
    
    
    
    $14,364,106.46By:
    
    TENNENBAUM CAPITAL PARTNERS, LLCIts:
    
    Investment ManagerBy:
    
    /s/ Rajneesh VigName: Rajneesh VigTitle: PartnerTENNENBAUM OPPORTUNITIES PARTNERS V, LP,
    
    
    
    Principal Amount of Loans:as a Lender
    
    
    
    $52,907,792.12By:
    
    TENNENBAUM CAPITAL PARTNERS, LLCIts:
    
    Investment ManagerBy:
    
    /s/ Rajneesh VigName: Rajneesh VigTitle: Partner
 Signature Page to Fifth Amendment to Credit Agreement




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TENNENBAUM MULTI-STRATEGY MASTER FUND,
    
    
    
    Principal Amount of Loans:as a Lender
    
    
    
    $48,461,802.01By:
    
    TENNENBAUM CAPITAL PARTNERS, LLCIts:
    
    Investment AdvisorBy:
    
    /s/ Eric PagelName: Eric PagelTitle: Partner
 Signature
Page to Fifth Amendment to Credit Agreement




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MITEL NETWORKS, INC.By:
    /s/ Gregory J. HiscockName:
    Gregory J. HiscockTitle:
    SecretaryMITEL US HOLDINGS, INC.By:
    /s/ Gregory J. HiscockName:
    Gregory J. HiscockTitle:
    SecretaryMITEL (DELAWARE), INC.By:
    /s/ Gregory J. HiscockName:
    Gregory J. HiscockTitle:
    SecretaryMITEL NETWORKS CORPORATIONBy:
    /s/ Gregory J. HiscockName:
    Gregory J. HiscockTitle:
    General Counsel and Corporate Secretary Signature
Page to Fifth Amendment to Credit Agreement