Document:

EX-10.3

 Exhibit 10.3 

VOTING SUPPORT AGREEMENT 

THIS AGREEMENT is made as of November 10, 2013 

BETWEEN: 
 AASTRA TECHNOLOGIES
LIMITED, a corporation existing under the laws of Canada (“Aastra”) 
 - and - 

MITEL NETWORKS CORPORATION, a corporation existing under the laws of Canada (“Mitel”) 

- and - 
 DR. TERENCE H.
MATTHEWS, an individual resident in the City of Ottawa (“Dr. Matthews”) 
 - and - 

KANATA RESEARCH PARK CORPORATION, a corporation existing under the laws of Canada (the “Securityholder”) 

RECITALS: 
  

	1.	The Securityholder is the beneficial owner of, or has control or direction over, the Subject Shares and Dr. Matthews is the beneficial owner of all of the voting shares of the Securityholder. 

 

	2.	The Securityholder understands that Aastra and Mitel are, concurrently with the execution and delivery of this Agreement, executing and delivering the Arrangement Agreement. 

 

	3.	This Agreement sets out the terms and conditions of the agreement of the Securityholder to abide by the covenants in respect of the Subject Shares and the other restrictions and covenants set forth herein and the
agreement of Dr. Matthews to cause the Securityholder to do so. 

 NOW THEREFORE, in consideration of the mutual
covenants in this Agreement and for other good and valuable consideration (the receipt and sufficiency of which are hereby acknowledged) the parties hereto agree as follows: 

 ARTICLE 1 

INTERPRETATION 
  

	1.1	Definitions 

 Capitalized terms used herein and not otherwise defined have the meanings ascribed thereto
in the Arrangement Agreement. In this Agreement, including the recitals: 
 “Arrangement Agreement” means the arrangement agreement
dated as of the date hereof between Aastra and Mitel, as the same may be amended in accordance with its terms; 
 “Business
Day” means any day, other than a Saturday, a Sunday or a statutory or civic holiday in Toronto, Ontario; 

“Contracts” means contracts, licences, leases, agreements, obligations, promises, undertakings, understandings, arrangements,
documents, commitments, entitlements or engagements to which the Securityholder is a party or by which it is bound or under which the Securityholder has, or will have, any liability or contingent liability (in each case, whether written or oral,
express or implied), and includes any quotations, orders, proposals or tenders which remain open for acceptance and warranties and guarantees; 

“Convertible Securities” has the meaning ascribed thereto in Section 2.1(b); 

“Expiry Time” has the meaning ascribed thereto in Section 3.1(a); 

“Locked-Up Securities” has the meaning ascribed thereto in Section 3.1(c); 

“Notice” has the meaning ascribed thereto in Section 4.7; 

“Subject Shares” means all Mitel Shares beneficially owned or controlled, directly or indirectly, by the Securityholder and its
Affiliates as at the date hereof, and shall further include any Mitel Shares acquired or over which control is acquired by the Securityholder after the date hereof; and 

“Transfer” has the meaning ascribed thereto in Section 3.1(a). 

 

	1.2	Singular; Plural, etc. 

 In this Agreement, words importing the singular number include the plural and
vice versa and words importing gender include the masculine, feminine and neuter genders. 
  

	1.3	Currency 

 Unless otherwise expressly stated, all references to currency herein shall be deemed to be
references to Canadian currency. 

  
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	1.4	Headings, etc. 

 The division of this Agreement into Articles, Sections and Schedules and the insertion
of the recitals and headings are for convenience of reference only and shall not affect the construction or interpretation of this Agreement and, unless otherwise stated, all references in this Agreement or in the Schedules hereto to Articles,
Sections and Schedules refer to Articles, Sections and Schedules of and to this Agreement or of the Schedules in which such reference is made, as applicable. 
  

	1.5	Date for any Action 

 In the event that any date on which any action is required to be taken hereunder by
any of the parties is not a Business Day, such action shall be required to be taken on the next succeeding day which is a Business Day. 
  

	1.6	Governing Law 

 This Agreement shall be governed, including as to validity, interpretation and effect, by
the laws of the Province of Ontario and the laws of Canada applicable therein, and shall be construed and treated in all respects as an Ontario contract. Each of the parties hereby irrevocably attorns to the non-exclusive jurisdiction of the Courts
of the Province of Ontario in respect of all matters arising under and in relation to this Agreement. 
  

	1.7	Incorporation of Schedules 

 The Schedules attached hereto and described below shall, for all purposes
hereof, form an integral part of this Agreement. 
 Schedule A – Subject Shares 

Schedule B – Form of Written Consent 

ARTICLE 2 

REPRESENTATIONS AND WARRANTIES 
  

	2.1	Representations and Warranties of the Securityholder 

 The Securityholder represents and warrants to
Aastra and Mitel (and acknowledges that Aastra and Mitel are relying on these representations and warranties in completing the transactions contemplated hereby and by the Arrangement Agreement) the matters set out below: 

 

	 	(a)	The Securityholder has the corporate power to execute and deliver this Agreement and to consummate the transactions contemplated hereby. This Agreement has been duly authorized, executed and delivered by the
Securityholder and constitutes a valid and binding obligation of the Securityholder enforceable against it in accordance with its terms, subject to bankruptcy, insolvency and other Laws affecting the enforcement of creditors’ rights generally
and subject to the qualification that equitable remedies may only be granted in the discretion of a court of competent jurisdiction.; 

  
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	 	(b)	The Mitel Shares as set forth in Schedule A represent all the Mitel Shares or securities exercisable or convertible into or exchangeable for Mitel Shares (“Convertible Securities”) held of record or
beneficially owned, directly or indirectly, or controlled or directed by the Securityholder. Other than the securities set forth in Schedule A, neither the Securityholder nor any of its Affiliates owns of record or beneficially, or exercises control
or direction over, directly or indirectly, or has any agreement or option, or right or privilege (whether by Law, pre-emptive or contractual) capable of becoming an agreement or option, for the purchase or acquisition by the Securityholder or any of
its Affiliates or transfer to the Securityholder or any of its Affiliates of additional Mitel Shares or Convertible Securities; 

  

	 	(c)	The Securityholder is, and will continue to be until the Effective Time, the sole beneficial owner of the Subject Shares, with good title thereto, free and clear of all encumbrances, liens, restrictions (other than
resale, vesting or other similar restrictions), charges, claims and rights of others; 

  

	 	(d)	The Securityholder has the sole right to sell and vote or direct the sale and voting of the Subject Shares; 

  

	 	(e)	No Person has any agreement or option, or any right or privilege (whether by Laws, pre-emptive or contractual) capable of becoming an agreement or option, for the purchase, acquisition or transfer of any of the Subject
Shares or any interest therein or right thereto; 

  

	 	(f)	None of the Subject Shares is subject to any power of attorney, proxy, voting trust, vote pooling or other agreement with respect to the right to vote the Subject Shares, call meetings of any of Mitel’s
securityholders or give shareholder consents or approvals of any kind, other than as set out in the Shareholders Agreement dated as of April 27, 2010 between, among others, Mitel and Dr. Matthews; 

 

	 	(g)	None of the execution and delivery by the Securityholder of this Agreement or the completion of the transactions contemplated hereby or the compliance by the Securityholder with the Securityholder’s obligations
hereunder will violate, contravene, result in any breach of, or be in conflict with, or constitute a default under, or create a state of facts which after notice or lapse of time or both would constitute a default under, any term or provision of:
(i) any constating or governing documents, by-laws or resolutions of the Securityholder; (ii) any Contract to which the Securityholder is a party or by which the Securityholder or any of the property or assets of the Securityholder are
bound; (iii) any judgment, decree, order or award of any Governmental Entity; or (iv) subject to receipt of any Regulatory Approvals as contemplated in the Arrangement Agreement, any applicable Laws; 

  
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	 	(h)	No consent, waiver, approval, authorization, order, exemption, registration, licence or declaration of or by, or filing with, or notification to any Governmental Entity which has not been made or obtained is required to
be made or obtained by the Securityholder in connection with the execution and delivery by the Securityholder and enforcement against the Securityholder of this Agreement or the consummation of any transactions provided for herein other than any
filings under insider or early warning requirements of applicable securities laws (provided that the Securityholder makes no representations or warranties with respect to the consents, waivers, approvals, authorizations or declarations of or by, or
filings with, or notices to any Governmental Entities or other third parties on the part of Aastra or Mitel necessary for the consummation of the transactions contemplated by the Arrangement Agreement); and 

 

	 	(i)	There is no private or governmental action, suit, claim, arbitration, investigation or other proceeding in progress or pending before any Governmental Entity, or, to the knowledge of the Securityholder, threatened
against the Securityholder or any of its Affiliates or any of their directors or officers (in their capacities as such) that, individually or in the aggregate, could adversely affect in any manner the Securityholder’s ability to enter into this
Agreement or perform its obligations hereunder or the title of the Securityholder to any of the Subject Shares. There is no judgment, decree or order against the Securityholder or any of its Affiliates or any of their directors or officers (in their
capacities as such) that could prevent, enjoin, alter, delay or adversely affect in any manner the ability of the Securityholder to enter into this Agreement, to perform its obligations under this Agreement or the title of the Securityholder to any
of the Subject Shares. 

  

	2.2	Representations and Warranties of Aastra 

 Aastra represents and warrants to the Securityholder (and
acknowledges that the Securityholder is relying on these representations and warranties in completing the transactions contemplated hereby and by the Arrangement Agreement) that Aastra is a corporation duly incorporated and validly existing under
the laws of the Canada and has all necessary corporate power, authority and capacity to enter into this Agreement and to carry out its obligations under this Agreement. The execution and delivery of this Agreement and the consummation of the
transactions contemplated by this Agreement have been duly authorized by all necessary corporate action on the part of Aastra. This Agreement constitutes a valid and binding obligation of Aastra enforceable against it in accordance with its terms,
subject to bankruptcy, insolvency and other Laws affecting the enforcement of creditors’ rights generally and subject to the qualification that equitable remedies may only be granted in the discretion of a court of competent jurisdiction. 

 

	2.3	Representations and Warranties of Mitel 

 Mitel represents and warrants to the Securityholder (and
acknowledges that the Securityholder is relying on these representations and warranties in completing the transactions contemplated hereby and by the Arrangement Agreement) that Mitel is a corporation duly incorporated and validly existing under the
laws of the Canada and has all necessary corporate power, authority and capacity to enter into this Agreement and to carry out its obligations under this Agreement. 

  
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The execution and delivery of this Agreement and the consummation of the transactions contemplated by this Agreement have been duly authorized by all necessary corporate action on the part of
Mitel. This Agreement constitutes a valid and binding obligation of Mitel enforceable against it in accordance with its terms, subject to bankruptcy, insolvency and other Laws affecting the enforcement of creditors’ rights generally and subject
to the qualification that equitable remedies may only be granted in the discretion of a court of competent jurisdiction. 
 ARTICLE 3

 COVENANTS 
  

	3.1	Covenants of the Securityholder and Dr. Matthews 

  

	 	(a)	The Securityholder hereby irrevocably and unconditionally covenants with Aastra and Mitel that from the date of this Agreement until the termination of this Agreement in accordance with its terms (the “Expiry
Time”), the Securityholder shall not (A) sell, transfer, gift, assign, convey, pledge, hypothecate, encumber, option, grant a security interest in or otherwise dispose of any right or interest in (including by way of deposit or tender
under any take-over bid) (any such event, a “Transfer”) any of the Subject Shares, or enter into any agreement, arrangement or understanding in connection therewith (whether by actual disposition or effective economic disposition
due to cash settlement or otherwise), without having first obtained the prior written consent of Aastra and Mitel, provided that the Securityholder may Transfer any of the Subject Shares to Dr. Matthews or an entity controlled by
Dr. Matthews without such consent as long as the transferee assumes all of the obligations of the Securityholder hereunder in respect of the Subject Shares so transferred, or (B) other than as set forth herein, grant any proxies or powers
of attorney, deposit any Subject Shares into a voting trust, in any way transfer any of the voting rights associated with any of the Subject Shares other than to Dr. Matthews or an entity controlled by Dr. Matthews, provided that
Dr. Matthews or such entity controlled by Dr. Matthews agrees to abide by the terms of this Agreement, or enter into a voting agreement, understanding or arrangement with respect to the right to vote the Subject Shares, call meetings of
Mitel Shareholders or give shareholder consents or approvals of any kind with respect to any Subject Shares. 

  

	 	(b)	The Securityholder hereby covenants, undertakes and agrees from time to time until the Expiry Time to vote (or cause to be voted) all the Subject Shares, at any meeting of any of holders of Mitel Shares at which the
Securityholder is entitled to vote and in any action by written consent of the holders of Mitel Shares (including, without limitation, a consent addressed to the TSX and NASDAQ confirming that such holder is in favour of the Arrangement and the
issuance of the Consideration Shares and Option Shares, which consent shall be substantially in the form attached as Schedule B hereto, with such changes as may be required by the TSX or NASDAQ): 

 

	 	(i)	in favour of the approval, consent, ratification and adoption of the Arrangement and the transactions contemplated by the Arrangement Agreement (and any actions required for the consummation of the transactions
contemplated by the Arrangement Agreement, including the issuance of the Consideration Shares and the Option Shares in connection therewith); and 

  
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	 	(ii)	against (A) any merger, reorganization, consolidation, amalgamation, arrangement, business combination, share issuance (other than the Consideration Shares and Option Shares), or share exchange, liquidation,
dissolution, recapitalization, or similar transaction involving Mitel; (B) any sale, lease or transfer of any significant part of the assets of Mitel; (C) any Acquisition Proposal; (D) any material change in the capitalization of
Mitel (other than in connection with the issuance of the Consideration Shares and Option Shares) or the corporate structure or constating documents of Mitel; (E) any action that would reasonably be expected to impede, delay, interfere with, or
discourage the transactions contemplated by the Arrangement Agreement; and (F) any action that would result in a Mitel Material Adverse Effect. 

In connection with the foregoing, subject to this Section 3.1(b), the Securityholder hereby irrevocably and unconditionally agrees, upon the
request of Mitel or Aastra, to (A) deposit an irrevocable proxy, duly completed and executed in respect of all of the Subject Shares at least 10 days prior to any meeting of the holders of Mitel Shares to consider any of the matters identified
in paragraph (i) of this Section 3.1(b), voting all such Subject Shares in favour of the applicable matter(s), and (B) deliver to Mitel or Aastra, as applicable, an irrevocable written consent, duly completed and executed in respect
of all of the Subject Shares within 10 days of any request by Mitel or Aastra to provide such written consent in support of any of the matters identified in paragraph (i) of this Section 3.1(b) (including, without limitation, a consent
addressed to the TSX and NASDAQ confirming that such holder is in favour of the Arrangement and the issuance of the Consideration Shares and Option Shares, which consent shall be substantially in the form attached as Schedule B hereto, with such
changes as may be required by the TSX or NASDAQ). The Securityholder hereby irrevocably and unconditionally agrees that neither it nor any person on its behalf will take any action to withdraw, amend or invalidate any proxy or consent deposited by
the Securityholder pursuant to this Agreement notwithstanding any statutory or other rights which the Securityholder might have unless this Agreement is terminated in accordance with Section 4.1. 

 

	 	(c)	The Securityholder hereby covenants, undertakes and agrees until the date that is 180 days following the Effective Date (the “Lock-Up Period”), the Securityholder will not, without the prior written
consent of Aastra, 

  

	 	(i)	sell, offer to sell, contract or agree to sell, hypothecate, pledge, grant any option to purchase or otherwise dispose of or agree to dispose of, directly or indirectly, 10,872,549 of the Subject Shares (the
“Locked-Up Securities”); 

  
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	 	(ii)	enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the Locked-Up Securities, whether any such transaction is to be settled by
delivery of Mitel Shares or such other securities, in cash or otherwise; or 

  

	 	(iii)	publicly announce an intention to effect any transaction specified in clause (i) or (ii). 

The Securityholder hereby authorizes Mitel and its transfer agent, during the Lock-Up Period, to decline the transfer of, or to note stop
transfer restrictions on the stock register and other records relating to the Locked-Up Securities of which the Securityholder is the registered holder, and, with respect to Locked-Up Securities of which the Securityholder is the beneficial owner
but not the registered holder, the Securityholder hereby agrees to cause such registered holder to authorize Mitel and its transfer agent, during the Lock-Up Period, to decline the transfer of or to note stop transfer restrictions on the stock
register and other records relating to such Locked-Up Securities. Notwithstanding the foregoing, if any other party is released, in full or in part, from the lock-up restrictions of any similar voting support agreement related to the transactions
contemplated by the Arrangement Agreement, then the Securityholder shall be released in the same manner from the restrictions of this Agreement (i.e., in the case where shares of such individual or entity are released from lock-up restrictions, the
same percentage of shares held by the Securityholder shall be released from the restrictions of this Agreement on the same terms). 
  

	 	(d)	The Securityholder agrees that, until the Expiry Time, neither the Securityholder nor any of its Representatives will, directly or indirectly: (A) solicit, initiate, encourage or otherwise facilitate (including by
way of entering into any agreement, arrangement or understanding) inquiries, submissions of proposals or offers from, or provide information to, any other person, entity or group (other than Aastra or Mitel) relating to any Acquisition Proposal or
potential Acquisition Proposal, (B) participate in any discussions or negotiations regarding any Acquisition Proposal, or (C) accept or enter into, or publicly propose to accept or enter into, any letter of intent, agreement, arrangement
or understanding related to any Acquisition Proposal. Nothing hereunder shall prevent any shareholder, director or officer of the Securityholder who is a director or officer of Mitel from doing any act or thing that such director or officer is
properly obligated to do in such capacity, provided that such act or thing is permitted by and is done in strict compliance with the terms of the Arrangement Agreement. 

 

	 	(e)	The Securityholder hereby agrees to: 

  

	 	(i)	 immediately cease and cause to be terminated any and all solicitations, encouragements, existing discussions and negotiations, if any, with any

  
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person or group or any agent or representative of such person or group before the date of this Agreement with respect to any Acquisition Proposal or potential Acquisition Proposal; and

  

	 	(ii)	immediately (and in any event within 24 hours following receipt) notify Mitel of any Acquisition Proposal or inquiry in respect of a potential Acquisition Proposal of which the Securityholder or, to the knowledge of the
Securityholder, any of the shareholders, directors or officers of the Securityholder becomes aware. Such notification shall be made orally and in writing and shall include the identity of the person making such Acquisition Proposal or inquiry, a
description of the material terms and conditions thereof, together with a copy of all documentation relating to such Acquisition Proposal or inquiry. 

  

	 	(f)	The Securityholder hereby irrevocably waives any rights of appraisal or rights of dissent that the Securityholder may have arising from the transactions contemplated by the Arrangement Agreement. 

 

	 	(g)	The Securityholder hereby agrees, until the Expiry Time, to not make any statements which may reasonably be construed as being against the transactions contemplated by the Arrangement Agreement or any aspect thereof and
to not bring, or threaten to bring, any suit or proceeding for the purpose of, or which has the effect of, directly or indirectly, stopping, preventing, impeding, delaying or varying such transactions or any aspect thereof. 

 

	 	(h)	The Securityholder agrees to promptly notify Aastra and Mitel of any acquisitions by the Securityholder or any of its respective Affiliates of any Mitel Shares after the date hereof. Any such securities shall be subject
to the terms of this Agreement as though they were Subject Shares owned by the Securityholder on the date hereof. 

  

	 	(i)	The Securityholder agrees that, until the Expiry Time, it will not (i) exercise any securityholder rights or remedies available at common law or pursuant to applicable securities legislation; or (ii) take any
other action of any kind, in each case which might reasonably be regarded as likely to reduce the success of, or delay or interfere with the completion of, the transactions contemplated by the Arrangement Agreement. 

 

	 	(j)	The Securityholder hereby irrevocably consents to: 

  

	 	(i)	details of this Agreement being set out in any information circular and court documents produced by Aastra, Mitel or any of their respective Affiliates in connection with the transactions contemplated by this Agreement
and the Arrangement Agreement; 

  

	 	(ii)	this Agreement being made publicly available, including by filing on SEDAR. 

  
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	 	(k)	Except as required by applicable Law or applicable stock exchange requirements, the Securityholder shall not make any public announcement or statement with respect to the transactions contemplated herein or pursuant to
the Arrangement Agreement without the prior written approval of Mitel; and 

  

	 	(l)	Dr. Matthews hereby agrees to cause the Securityholder to abide by the covenants in respect of the Subject Shares and the other restrictions and covenants set forth herein. 

ARTICLE 4 
 GENERAL

  

	4.1	Termination 

 This Agreement shall terminate and be of no further force or effect only upon the earliest
of: 
  

	 	(a)	the written agreement of Aastra, Mitel, the Securityholder and Dr. Matthews; 

  

	 	(b)	the termination of the Arrangement Agreement in accordance with its terms or the amendment of the Arrangement Agreement in any manner that the Securityholder determines, in the exercise of its sole discretion, would
reasonably be expected to have an adverse effect on its or Dr. Matthews’ rights or interests in Mitel securities; 

  

	 	(c)	the Effective Time; or 

  

	 	(d)	the Outside Date. 

  

	4.2	Time of the Essence 

 Any date, time or period referred to in this Agreement shall be of the essence,
except to the extent to which the Securityholder, Dr. Matthews, Aastra and Mitel agree in writing to vary any date, time or period, in which event the varied date, time or period shall be of the essence. 

 

	4.3	Equitable Relief 

 The parties agree that irreparable harm will occur for which money damages will not be
an adequate remedy at Law in the event that any of the provisions of this Agreement are not performed by the Securityholder in accordance with their terms or are otherwise breached. It is accordingly agreed that Aastra and Mitel shall be entitled to
an injunction or injunctions and other equitable relief to prevent breaches or threatened breaches of the provisions of this Agreement by the Securityholder and shall be entitled to obtain specific performance by the Securityholder of any such
provisions. The Securityholder hereby agrees not to seek the posting of any security bond or other assurance in respect of such injunctive or other equitable relief. Such remedies will not be the exclusive remedies for any breach of this Agreement
and will be in addition to all other remedies available at Law or equity. 

  
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	4.4	Fiduciary Duties 

 Aastra and Mitel acknowledge that the Securityholder is not making any agreement or
understanding herein in any capacity other than in its capacity as securityholder of Mitel. Nothing herein shall restrict the Securityholder or Dr. Matthews from taking in good faith any actions necessary to discharge Dr Matthews’
fiduciary duties as a director or officer of Mitel. 
  

	4.5	Waiver; Amendment 

 Each party hereto agrees and confirms that any provision of this Agreement may be
amended or waived if, and only if, such amendment or waiver is in writing and signed, in the case of an amendment, by the Securityholder, Dr. Matthews, Aastra and Mitel or in the case of a waiver, by the party against whom the waiver is to be
effective and no failure or delay by any party in exercising any right, power or privilege hereunder shall operate as a waiver thereof nor shall any single or partial exercise thereof preclude any other or further exercise. 

 

	4.6	Entire Agreement 

 This Agreement constitutes the entire agreement among the parties with respect to the
subject matter hereof and supersedes all prior agreements and understandings among the parties with respect thereto. 
  

	4.7	Notices 

 Any notice, consent or approval required or permitted to be given in connection with this
Agreement (in this Section referred to as a “Notice”) shall be in writing and shall be sufficiently given if delivered (whether in person, by courier service or other personal method of delivery), or if transmitted by facsimile or
e-mail: 
  

	 	(a)	if to Mitel: 

 Mitel Networks Corporation 

350 Legget Drive 
 Kanata, ON,
Canada K2K 2W7 
  

			
	Attention:	  	Steve Spooner
	Facsimile:	  	(613) 592-7807
	Email:	  	steve_spooner@mitel.com

 with a copy (which shall not constitute notice) to: 

Osler, Hoskin & Harcourt LLP 

1 First Canadian Place, Suite 6600 

Toronto, Ontario M5X 1B8 
  

			
	Attention:	  	Craig Wright and Jeremy Fraiberg
	Facsimile:	  	(416) 862-6666
	Email:	  	cwright@osler.com and jfraiberg@osler.com

  
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	 	(b)	if to Aastra: 

 Aastra Technologies Limited 

155 Snow Boulevard 
 Concord,
Ontario, Canada L4K 4N9 
  

			
	Attention:	  	 Francis Shen

	Facsimile:	  	 (905) 760-4238

	Email:	  	 fshen@aastra.com

 with a copy (which shall not constitute notice) to: 

McCarthy Tétrault LLP 

Suite 5300, TD Bank Tower 
 Box
48, 66 Wellington Street West 
 Toronto ON M5K 1E6 
  

			
	Attention:	  	 Gary Girvan and George Takach

	Facsimile:	  	 (416) 868-0673

	Email:	  	 ggirvan@mccarthy.ca and gtakach@mccarthy.ca

  

	 	(c)	if to the Securityholder or Dr. Matthews: 

 c/o Kanata Research Park Corporation 

350 Leggett Drive 
 Kanata, ON K2K
2W7 
 Attn: Dr. T.H. Matthews, Paul Chiarelli and Christa Plumley 

Fax: (613) 271-9810 
 Email:
pchiarelli@wesleyclover.com; cplumley@wesleyclover.com 
 with a copy to (which shall not constitute notice): 

Osler, Hoskin & Harcourt LLP 

P.O. Box 50 
 1 First Canadian
Place 
 100 King Street West 

Toronto, ON M5X 1B8 
 Attention:
J. Mark DesLauriers 
 Fax: (416) 862-6666 

E-mail: mdeslauriers@osler.com 
 Any Notice
delivered or transmitted to a party as provided above shall be deemed to have been given and received on the day it is delivered or transmitted, provided that it is delivered or transmitted on a Business Day prior to 5:00 p.m. local time in the
place of delivery or receipt. If the Notice is delivered or transmitted after 5:00 p.m. local time or if the day is not a Business Day, then the Notice shall be deemed to have been given and received on the next Business Day. 

  
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 Either party hereto may, from time to time, change its address by giving Notice to the other parties in
accordance with the provisions of this Section 4.7. 
  

	4.8	Severability 

 If, in any jurisdiction, any provision of this Agreement or its application to any party
or circumstance is restricted, prohibited or unenforceable, such provision shall, as to such jurisdiction, be ineffective only to the extent of such restriction, prohibition or unenforceability without invalidating the remaining provisions of this
Agreement and without affecting the validity or enforceability of such provision in any other jurisdiction or without affecting its application to other parties or circumstances. Upon such determination that any term or other provision is invalid,
illegal or incapable of being enforced, the parties hereto shall negotiate in good faith to modify this Agreement so as to effect the original intent of the parties as closely as possible in a mutually acceptable manner in order that the terms of
this Agreement remain as originally contemplated to the fullest extent possible. 
  

	4.9	Successors and Assigns 

 The provisions of this Agreement shall be binding upon and enure to the benefit
of the parties hereto and their respective successors, permitted assigns and legal personal representatives, provided that no party may assign, delegate or otherwise transfer any of its rights, interests or obligations under this Agreement without
the prior written consent of the other parties hereto, except that Aastra may assign, delegate or otherwise transfer any of its rights, interests or obligations under this Agreement to an Affiliate without reducing its own obligations hereunder
without the consent of the Securityholder. 
  

	4.10	Expenses 

 Each party shall pay all costs and expenses (including the fees and disbursements of legal
counsel and other advisers) it incurs in connection with the negotiation, preparation and execution of this Agreement and the transactions contemplated by this Agreement. 
  

	4.11	Independent Legal Advice 

 The Securityholder acknowledges that it has been afforded the opportunity to
obtain independent legal advice and confirms by the execution of this Agreement that it has either done so or waived its right to do so in connection with the entering into of this Agreement. 

 

	4.12	Further Assurances 

 The parties hereto shall, with reasonable diligence, do all things and provide all
such reasonable assurances as may be required to consummate the transactions contemplated by this Agreement, and each party shall provide such further documents or instruments required by the other party as may be reasonably necessary or desirable
to effect the purpose of this Agreement and carry out its provisions, whether before or after the Effective Time. 

  
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	4.13	Execution and Delivery 

 This Agreement may be executed in one or more counterparts, each of which shall
be deemed to be an original but all of which together shall constitute one and the same instrument. The parties shall be entitled to rely upon delivery of an executed facsimile or similar executed electronic copy of this Agreement, and such
facsimile or similar executed electronic copy shall be legally effective to create a valid and binding agreement between the parties. 

[Signature page follows.] 

  
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 IN WITNESS OF WHICH the parties have executed this Agreement. 

 

					
	AASTRA TECHNOLOGIES LIMITED
		
	By:	 	 /s/ Anthony Shen

		 	Name:	 	Anthony Shen
			
		 	Title:	 	Co-Chief Executive Officer
	
	MITEL NETWORKS CORPORATION
		
	By:	 	 /s/ Steve Spooner

		 	Name:	 	Steve Spooner
			
		 	Title:	 	Chief Financial Officer
	
	KANATA RESEARCH PARK CORPORATION
		
	By:	 	 /s/ Paul Chiarelli

		 	Name:	 	Paul Chiarelli
			
		 	Title:	 	Chief Executive Officer
		
		 	 /s/ Dr. Terence H. Matthews

		 	DR. TERENCE H. MATTHEWS

  
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 SCHEDULE “A” 

 

							
	 Registered Owner
	  	 Beneficial Owner
	  	Mitel Shares	 
	 KANATA RESEARCH PARK CORPORATION
	  	KANATA RESEARCH PARK CORPORATION	  	 	12,080,610	  

  
 A-1 

 SCHEDULE “B” 

FORM OF WRITTEN CONSENT 

(see attached) 

 WRITTEN CONSENT 

 

			
	TO:	  	 TORONTO STOCK EXCHANGE
  

NASDAQ GLOBAL MARKET

		
	FROM:	  	 KANATA RESEARCH PARK CORPORATION
  

ARSENAL HOLDCO I S.A.R.L.
  

ARSENAL HOLDCO II S.A.R.L.

 WHEREAS Kanata Research Park Corporation (“Kanata”) beneficially owns 12,080,610 common shares of
Mitel Networks Corporation (“Mitel”) as of the date hereof, representing voting ownership of approximately 22.4% of the outstanding Mitel common shares (“Mitel Shares”); 

AND WHEREAS Arsenal Holdco I S.A.R.L. (“Arsenal I”) and Arsenal Holdco II S.A.R.L. (“Arsenal II”, and together with
Arsenal I, “Arsenal”) collectively beneficially own 20,097,546 Mitel Shares as of the date hereof, representing voting ownership of approximately 37.3% of the outstanding Mitel Shares, and together with Kanata, 59.7% of the
outstanding Mitel Shares; 
 AND WHEREAS on November 10, 2013, Mitel entered into an arrangement agreement with Aastra
Technologies Limited (“Aastra”) pursuant to which Mitel has agreed to acquire all of the outstanding common shares of Aastra by way of an arrangement under the Canada Business Corporations Act (the
“Arrangement”) for consideration consisting of cash and Mitel Shares; 
 AND WHEREAS Mitel expects to issue up
to approximately — million Mitel Shares in connection with the Arrangement, representing approximately —% of the total number of outstanding
Mitel Shares as of the date hereof, consisting of: (i) approximately — million Mitel Shares to be issued to Aastra shareholders; and (ii) up to approximately — Mitel Shares to be issued upon exercise of replacement options to be issued to holders of Aastra options in exchange for such options; 

AND WHEREAS upon completion of the Arrangement: (i) Kanata will have voting ownership of approximately 12.8% of the outstanding Mitel Shares;
(ii) Arsenal will have voting ownership of approximately 21.3% of the outstanding Mitel Shares; (iii) Mitel shareholders, other than Kanata and Arsenal, will hold approximately 22.9% of the outstanding Mitel Shares; and (iv) former
Aastra shareholders will hold approximately 43% of the outstanding Mitel Shares; 
 AND WHEREAS each of Kanata, Arsenal I and Arsenal II
acknowledge that the Arrangement will likely be completed during the first quarter of 2014 and, in any event, no later than March 14, 2014; 

 AND WHEREAS each of Kanata, Arsenal I and Arsenal II are familiar with the terms of the Arrangement;

 AND WHEREAS as the number of Mitel Shares to be issued in connection with the Arrangement (the “Mitel Share Issuance”)
exceeds 25% of the total number of outstanding Mitel Shares, the Mitel Share Issuance requires the approval of Mitel shareholders under section 611(c) of the TSX Company Manual; 

AND WHEREAS as the Mitel Shares Issuance exceeds 20% of the total number of outstanding Mitel Shares, the Mitel Share Issuance requires the approval of
Mitel shareholders under Rule 5635(a)(1)(A) of the NASDAQ Stock Market Rules (the “NASDAQ Rules”), absent the availability of an exemption therefrom; 

AND WHEREAS this Notice is being submitted to the TSX under section 604(d) of the TSX Company Manual and under Rule 5635(e)(4) of
the NASDAQ Rules as written evidence of the required shareholder approval of the Mitel Share Issuance; 
 NOW THEREFORE each of Kanata,
Arsenal I and Arsenal II confirms that it is in favour of the Arrangement and irrevocably consents to the Mitel Share Issuance. 

[The remainder of this page is left blank intentionally] 

  
 - 2 - 

 DATED this     day of November, 2013. 

 

			
	KANATA RESEARCH PARK CORPORATION
		
	by:	 	  

		 	Name:
		 	Title:
	
	ARSENAL HOLDCO I S.A.R.L.
		
	by:	 	  

		 	Name:
		 	Title:
	
	ARSENAL HOLDCO II S.A.R.L.
		
	by:	 	  

		 	Name:
		 	Title:

  
 - 3 -EX-10.4

 Exhibit 10.4 

VOTING SUPPORT AGREEMENT 

THIS AGREEMENT is made as of November 10, 2013 

BETWEEN: 
 AASTRA TECHNOLOGIES
LIMITED, a corporation existing under the laws of Canada (“Aastra”) 
 - and - 

MITEL NETWORKS CORPORATION, a corporation existing under the laws of Canada (“Mitel”) 

- and - 
 ARSENAL HOLDCO I,
S.A.R.L., a company existing under the laws of Luxembourg (“Arsenal I”) 
 - and - 

ARSENAL HOLDCO II, S.A.R.L., a company existing under the laws of Luxembourg (“Arsenal II” and together with Arsenal
I, the “Securityholders” and each, a “Securityholder”) 
 RECITALS: 

 

	1.	The Securityholders are the beneficial owners of, or have control or direction over, the Subject Shares. 

  

	2.	The Securityholders understand that Aastra and Mitel are, concurrently with the execution and delivery of this Agreement, executing and delivering the Arrangement Agreement. 

 

	3.	This Agreement sets out the terms and conditions of the agreement of the Securityholders to abide by the covenants in respect of the Subject Shares and the other restrictions and covenants set forth herein.

 NOW THEREFORE, in consideration of the mutual covenants in this Agreement and for other good and valuable
consideration (the receipt and sufficiency of which are hereby acknowledged) the parties hereto agree as follows: 

 ARTICLE 1 

INTERPRETATION 
  

	1.1	Definitions 

 Capitalized terms used herein and not otherwise defined have the meanings ascribed thereto
in the Arrangement Agreement. In this Agreement, including the recitals: 
 “Arrangement Agreement” means the arrangement agreement
dated as of the date hereof between Aastra and Mitel, as the same may be amended in accordance with its terms; 
 “Business
Day” means any day, other than a Saturday, a Sunday or a statutory or civic holiday in Toronto, Ontario; 

“Contracts” means contracts, licences, leases, agreements, obligations, promises, undertakings, understandings, arrangements,
documents, commitments, entitlements or engagements to which a Securityholder is a party or by which it is bound or under which a Securityholder has, or will have, any liability or contingent liability (in each case, whether written or oral, express
or implied), and includes any quotations, orders, proposals or tenders which remain open for acceptance and warranties and guarantees; 

“Convertible Securities” has the meaning ascribed thereto in Section 2.1(b); 

“Expiry Time” has the meaning ascribed thereto in Section 3.1(a); 

“Locked-Up Securities” has the meaning ascribed thereto in Section 3.1(c); 

“Notice” has the meaning ascribed thereto in Section 4.7; 

“Subject Shares” means all Mitel Shares beneficially owned or controlled, directly or indirectly, by the Securityholders and their
Affiliates as at the date hereof, and shall further include any Mitel Shares acquired or over which control is acquired by the Securityholders after the date hereof; and 

“Transfer” has the meaning ascribed thereto in Section 3.1(a). 

 

	1.2	Singular; Plural, etc. 

 In this Agreement, words importing the singular number include the plural and
vice versa and words importing gender include the masculine, feminine and neuter genders. 
  

	1.3	Currency 

 Unless otherwise expressly stated, all references to currency herein shall be deemed to be
references to Canadian currency. 
  

	1.4	Headings, etc. 

 The division of this Agreement into Articles, Sections and Schedules and the insertion
of the recitals and headings are for convenience of reference only and shall not affect the construction 

  
 - 2 - 

 
or interpretation of this Agreement and, unless otherwise stated, all references in this Agreement or in the Schedules hereto to Articles, Sections and Schedules refer to Articles, Sections and
Schedules of and to this Agreement or of the Schedules in which such reference is made, as applicable. 
  

	1.5	Date for any Action 

 In the event that any date on which any action is required to be taken hereunder by
any of the parties is not a Business Day, such action shall be required to be taken on the next succeeding day which is a Business Day. 
  

	1.6	Governing Law 

 This Agreement shall be governed, including as to validity, interpretation and effect, by
the laws of the Province of Ontario and the laws of Canada applicable therein, and shall be construed and treated in all respects as an Ontario contract. Each of the parties hereby irrevocably attorns to the non-exclusive jurisdiction of the Courts
of the Province of Ontario in respect of all matters arising under and in relation to this Agreement. 
  

	1.7	Incorporation of Schedules 

 The Schedules attached hereto and described below shall, for all purposes
hereof, form an integral part of this Agreement. 
 Schedule A – Subject Shares 

Schedule B – Form of Written Consent 

ARTICLE 2 

REPRESENTATIONS AND WARRANTIES 
  

	2.1	Representations and Warranties of the Securityholders 

 The Securityholders, jointly and severally,
represent and warrant to Aastra and Mitel (and acknowledge that Aastra and Mitel are relying on these representations and warranties in entering into the transactions contemplated hereby and by the Arrangement Agreement) the matters set out below:

  

	 	(a)	The Securityholders have the corporate or organizational power to execute and deliver this Agreement and to consummate the transactions contemplated hereby. This Agreement has been duly authorized, executed and
delivered by the Securityholders and constitutes a valid and binding obligation of the Securityholders enforceable against them in accordance with its terms, subject to bankruptcy, insolvency and other Laws affecting the enforcement of
creditors’ rights generally and subject to the qualification that equitable remedies may only be granted in the discretion of a court of competent jurisdiction.; 

 

	 	(b)	 The Mitel Shares as set forth in Schedule A represent all the Mitel Shares or securities exercisable or convertible into or exchangeable for Mitel
Shares 

  
 - 3 - 

	 	
(“Convertible Securities”) held of record or beneficially owned, directly or indirectly, or controlled or directed by the Securityholders. Other than the securities set forth in
Schedule A, neither the Securityholders nor any of their Affiliates owns of record or beneficially, or exercises control or direction over, directly or indirectly, or has any agreement or option, or right or privilege (whether by Law, pre-emptive or
contractual) capable of becoming an agreement or option, for the purchase or acquisition by the Securityholders or any of their Affiliates or transfer to the Securityholders or any of their Affiliates of additional Mitel Shares or Convertible
Securities; 

  

	 	(c)	The Securityholders are, and will continue to be until the Effective Time, the sole beneficial owners of the Subject Shares, with good title thereto, free and clear of all encumbrances, liens, restrictions (other than
resale, vesting or other similar restrictions), charges, claims and rights of others; 

  

	 	(d)	The Securityholders have the sole right to sell and vote or direct the sale and voting of the Subject Shares; 

  

	 	(e)	No Person has any agreement or option, or any right or privilege (whether by Laws, pre-emptive or contractual) capable of becoming an agreement or option, for the purchase, acquisition or transfer of any of the Subject
Shares or any interest therein or right thereto; 

  

	 	(f)	None of the Subject Shares is subject to any power of attorney, proxy, voting trust, vote pooling or other agreement with respect to the right to vote the Subject Shares, call meetings of any of Mitel’s
securityholders or give shareholder consents or approvals of any kind, other than as set out in the Shareholders Agreement dated as of April 27, 2010 between, among others, Mitel and Dr. Matthews; 

 

	 	(g)	None of the execution and delivery by the Securityholders of this Agreement or the completion of the transactions contemplated hereby or the compliance by the Securityholders with the Securityholders’ obligations
hereunder will violate, contravene, result in any breach of, or be in conflict with, or constitute a default under, or create a state of facts which after notice or lapse of time or both would constitute a default under, any term or provision of:
(i) any constating or governing documents, by-laws or resolutions of the Securityholders; (ii) any Contract to which the Securityholders are a party or by which the Securityholders or any of the property or assets of the Securityholders
are bound; (iii) any judgment, decree, order or award of any Governmental Entity; or (iv) subject to receipt of any Regulatory Approvals as contemplated in the Arrangement Agreement, any applicable Laws; 

 

	 	(h)	 No consent, waiver, approval, authorization, order, exemption, registration, licence or declaration of or by, or filing with, or notification to any
Governmental Entity which has not been made or obtained is required to be made or obtained by the Securityholders in connection with the execution and delivery by the Securityholders and enforcement against the Securityholders of this Agreement or

  
 - 4 - 

	 	
the consummation of any transactions provided for herein other than any filings under insider or early warning requirements of applicable securities laws (provided that the Securityholders make
no representations or warranties with respect to the consents, waivers, approvals, authorizations or declarations of or by, or filings with, or notices to any Governmental Entities or other third parties on the part of Aastra or Mitel necessary for
the consummation of the transactions contemplated by the Arrangement Agreement); and 

  

	 	(i)	There is no private or governmental action, suit, claim, arbitration, investigation or other proceeding in progress or pending before any Governmental Entity, or, to the knowledge of the Securityholders, threatened
against the Securityholders or any of their Affiliates or any of their directors or officers (in their capacities as such) that, individually or in the aggregate, could adversely affect in any manner the Securityholders’ ability to enter into
this Agreement or perform their obligations hereunder or the title of the Securityholders to any of the Subject Shares. There is no judgment, decree or order against the Securityholders or any of their Affiliates or any of their directors or
officers (in their capacities as such) that could prevent, enjoin, alter, delay or adversely affect in any manner the ability of the Securityholders to enter into this Agreement, to perform their obligations under this Agreement or the title of the
Securityholders to any of the Subject Shares. 

  

	2.2	Representations and Warranties of Aastra 

 Aastra represents and warrants to the Securityholders (and
acknowledges that the Securityholders are relying on these representations and warranties in completing the transactions contemplated hereby and by the Arrangement Agreement) that Aastra is a corporation duly incorporated and validly existing under
the laws of the Canada and has all necessary corporate power, authority and capacity to enter into this Agreement and to carry out its obligations under this Agreement. The execution and delivery of this Agreement and the consummation of the
transactions contemplated by this Agreement have been duly authorized by all necessary corporate action on the part of Aastra. This Agreement constitutes a valid and binding obligation of Aastra enforceable against it in accordance with its terms,
subject to bankruptcy, insolvency and other Laws affecting the enforcement of creditors’ rights generally and subject to the qualification that equitable remedies may only be granted in the discretion of a court of competent jurisdiction. 

 

	2.3	Representations and Warranties of Mitel 

 Mitel represents and warrants to the Securityholders (and
acknowledges that the Securityholders are relying on these representations and warranties in completing the transactions contemplated hereby and by the Arrangement Agreement) that Mitel is a corporation duly incorporated and validly existing under
the laws of the Canada and has all necessary corporate power, authority and capacity to enter into this Agreement and to carry out its obligations under this Agreement. The execution and delivery of this Agreement and the consummation of the
transactions contemplated by this Agreement have been duly authorized by all necessary corporate action on the part of Mitel. This Agreement constitutes a valid and binding obligation of Mitel enforceable against it in accordance with its terms,
subject to bankruptcy, insolvency and other Laws affecting the enforcement of creditors’ rights generally and subject to the qualification that equitable remedies may only be granted in the discretion of a court of competent jurisdiction. 

  
 - 5 - 

 ARTICLE 3 

COVENANTS 
  

	3.1	Covenants of the Securityholders 

  

	 	(a)	The Securityholders hereby irrevocably and unconditionally covenant with Aastra and Mitel that from the date of this Agreement until the termination of this Agreement in accordance with its terms (the “Expiry
Time”), the Securityholders shall not (A) sell, transfer, gift, assign, convey, pledge, hypothecate, encumber, option, grant a security interest in or otherwise dispose of any right or interest in (including by way of deposit or tender
under any take-over bid) (any such event, a “Transfer”) any of the Subject Shares, or enter into any agreement, arrangement or understanding in connection therewith (whether by actual disposition or effective economic disposition
due to cash settlement or otherwise), without having first obtained the prior written consent of Aastra and Mitel, provided that the Securityholders may Transfer any of the Subject Shares to an entity controlled by them without such consent as long
as the transferee assumes all of the obligations of the Securityholders hereunder in respect of the Subject Shares so transferred, or (B) other than as set forth herein, grant any proxies or powers of attorney, deposit any Subject Shares into a
voting trust, in any way transfer any of the voting rights associated with any of the Subject Shares other than to an entity controlled by them, provided that such entity agrees to abide by the terms of this Agreement, or enter into a voting
agreement, understanding or arrangement with respect to the right to vote the Subject Shares, call meetings of Mitel Shareholders or give shareholder consents or approvals of any kind with respect to any Subject Shares 

 

	 	(b)	The Securityholders hereby covenant, undertake and agree from time to time until the Expiry Time to vote (or cause to be voted) all the Subject Shares, at any meeting of any of holders of Mitel Shares at which the
Securityholders are entitled to vote and in any action by written consent of the holders of Mitel Shares (including, without limitation, a consent addressed to the TSX and NASDAQ confirming that such holders are in favour of the Arrangement and the
issuance of the Consideration Shares and Option Shares, which consent shall be substantially in the form attached as Schedule B hereto, with such changes as may be required by the TSX or NASDAQ): 

 

	 	(i)	in favour of the approval, consent, ratification and adoption of the Arrangement and the transactions contemplated by the Arrangement Agreement (and any actions required for the consummation of the transactions
contemplated by the Arrangement Agreement, including the issuance of the Consideration Shares and the Option Shares in connection therewith); and 

  
 - 6 - 

	 	(ii)	against (A) any merger, reorganization, consolidation, amalgamation, arrangement, business combination, share issuance (other than the Consideration Shares and Option Shares), or share exchange, liquidation,
dissolution, recapitalization, or similar transaction involving Mitel; (B) any sale, lease or transfer of any significant part of the assets of Mitel; (C) any Acquisition Proposal; (D) any material change in the capitalization of
Mitel (other than in connection with the issuance of the Consideration Shares and Option Shares) or the corporate structure or constating documents of Mitel; (E) any action that would reasonably be expected to impede, delay, interfere with, or
discourage the transactions contemplated by the Arrangement Agreement; and (F) any action that is intended to result in a Mitel Material Adverse Effect. 

In connection with the foregoing, subject to this Section 3.1(b), the Securityholders hereby irrevocably and unconditionally agree, upon the
request of Mitel or Aastra, to (A) deposit an irrevocable proxy, duly completed and executed in respect of all of the Subject Shares at least 10 days prior to any meeting of the holders of Mitel Shares to consider any of the matters identified
in paragraph (i) of this Section 3.1(b), voting all such Subject Shares in favour of the applicable matter(s), and (B) deliver to Mitel or Aastra, as applicable, an irrevocable written consent, duly completed and executed in respect
of all of the Subject Shares within 10 days of any request by Mitel or Aastra to provide such written consent in support of any of the matters identified in paragraph (i) of this Section 3.1(b) (including, without limitation, a consent
addressed to the TSX and NASDAQ confirming that such holder is in favour of the Arrangement and the issuance of the Consideration Shares and Option Shares, which consent shall be substantially in the form attached as Schedule B hereto, with such
changes as may be required by the TSX or NASDAQ). The Securityholders hereby irrevocably and unconditionally agree that neither it nor any person on its behalf will take any action to withdraw, amend or invalidate any proxy or consent deposited by
the Securityholders pursuant to this Agreement notwithstanding any statutory or other rights which the Securityholders might have unless this Agreement is terminated in accordance with Section 4.1. 

 

	 	(c)	The Securityholders hereby covenant, undertake and agree until the date that is 180 days following the Effective Date (the “Lock-Up Period”), the Securityholders will not, without the prior written
consent of Aastra, 

  

	 	(i)	sell, offer to sell, contract or agree to sell, hypothecate, pledge, grant any option to purchase or otherwise dispose of or agree to dispose of, directly or indirectly, 18,144,786 of the Subject Shares (the
“Locked-Up Securities”); 

  

	 	(ii)	enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the Locked-Up Securities, whether any such transaction is to be settled by
delivery of Mitel Shares or such other securities, in cash or otherwise; or 

  

	 	(iii)	publicly announce an intention to effect any transaction specified in clause (i) or (ii). 

  
 - 7 - 

 The Securityholders hereby authorize Mitel and its transfer agent, during the Lock-Up Period, to
decline the transfer of, or to note stop transfer restrictions on the stock register and other records relating to the Locked-Up Securities of which the Securityholders are the registered holder, and, with respect to Locked-Up Securities of which
the Securityholders are the beneficial owner but not the registered holder, the Securityholders hereby agree to cause such registered holder to authorize Mitel and its transfer agent, during the Lock-Up Period, to decline the transfer of or to note
stop transfer restrictions on the stock register and other records relating to such Locked-Up Securities. Notwithstanding the foregoing, if any other party is released, in full or in part, from the lock-up restrictions of any similar voting support
agreement related to the transactions contemplated by the Arrangement Agreement, then the Securityholders shall be released in the same manner from the restrictions of this Agreement (i.e., in the case where shares of such individual or entity are
released from lock-up restrictions, the same percentage of shares held by the Securityholders shall be released from the restrictions of this Agreement on the same terms). 
  

	 	(d)	The Securityholders agree that, until the Expiry Time, neither the Securityholders nor any of their Representatives will, directly or indirectly: (A) solicit, initiate, encourage or otherwise facilitate (including
by way of entering into any agreement, arrangement or understanding) inquiries, submissions of proposals or offers from, or provide information to, any other person, entity or group (other than Aastra or Mitel) relating to any Acquisition Proposal
or potential Acquisition Proposal, (B) participate in any discussions or negotiations regarding any Acquisition Proposal, or (C) accept or enter into, or publicly propose to accept or enter into, any letter of intent, agreement,
arrangement or understanding related to any Acquisition Proposal. Nothing hereunder shall prevent any shareholder, director or officer of the Securityholders who is a director or officer of Mitel from doing any act or thing that such director or
officer is properly obligated to do in such capacity. 

  

	 	(e)	The Securityholders hereby agree to: 

  

	 	(i)	immediately cease and cause to be terminated any and all solicitations, encouragements, existing discussions and negotiations, if any, with any person or group or any agent or representative of such person or group
before the date of this Agreement with respect to any Acquisition Proposal or potential Acquisition Proposal; and 

  

	 	(ii)	 immediately (and in any event within 24 hours following receipt) notify Mitel of any Acquisition Proposal or inquiry in respect of a potential
Acquisition Proposal of which the Securityholders or, to the knowledge of the Securityholders, any of the shareholders, directors or officers of the Securityholders becomes aware. Such notification shall be made orally and in writing and shall
include the identity of the person making such 

  
 - 8 - 

	 	
Acquisition Proposal or inquiry, a description of the material terms and conditions thereof, together with a copy of all documentation relating to such Acquisition Proposal or inquiry.

  

	 	(f)	The Securityholders hereby irrevocably waive any rights of appraisal or rights of dissent that the Securityholders may have arising from the transactions contemplated by the Arrangement Agreement. 

 

	 	(g)	The Securityholders hereby agree, until the Expiry Time, to not make any statements which may reasonably be construed as being against the transactions contemplated by the Arrangement Agreement or any aspect thereof and
to not bring, or threaten to bring, any suit or proceeding for the purpose of, or which has the effect of, directly or indirectly, stopping, preventing, impeding, delaying or varying such transactions or any aspect thereof. 

 

	 	(h)	The Securityholders agree to promptly notify Aastra and Mitel of any acquisitions by the Securityholders or any of its respective Affiliates of any Mitel Shares after the date hereof. Any such securities shall be
subject to the terms of this Agreement as though they were Subject Shares owned by the Securityholders on the date hereof. 

  

	 	(i)	The Securityholders agree that, until the Expiry Time, it will not (i) exercise any securityholder rights or remedies available at common law or pursuant to applicable securities legislation; or (ii) take any
other action of any kind, in each case which might reasonably be regarded as likely to reduce the success of, or delay or interfere with the completion of, the transactions contemplated by the Arrangement Agreement. 

 

	 	(j)	The Securityholders hereby irrevocably consent to: 

  

	 	(i)	details of this Agreement being set out in any information circular and court documents produced by Aastra, Mitel or any of their respective Affiliates in connection with the transactions contemplated by this Agreement
and the Arrangement Agreement; 

  

	 	(ii)	this Agreement being made publicly available, including by filing on SEDAR. 

  

	 	(k)	Except as required by applicable Law or applicable stock exchange requirements, the Securityholders shall not make any public announcement or statement with respect to the transactions contemplated herein or pursuant to
the Arrangement Agreement without the prior written approval of Mitel. 

 ARTICLE 4 

GENERAL 
  

	4.1	Termination 

 This Agreement shall terminate and be of no further force or effect only upon the earliest
of: 
  

	 	(a)	the written agreement of Aastra, Mitel and each Securityholder; 

  
 - 9 - 

	 	(b)	the termination of the Arrangement Agreement in accordance with its terms or the amendment of the Arrangement Agreement in any manner that the Securityholders determine, in the exercise of their sole discretion, would
reasonably be expected to have an adverse effect on their rights or interests in the Mitel Shares; 

  

	 	(c)	the Effective Time; or 

  

	 	(d)	the Outside Date. 

  

	4.2	Time of the Essence 

 Any date, time or period referred to in this Agreement shall be of the essence,
except to the extent to which the Securityholders, Aastra and Mitel agree in writing to vary any date, time or period, in which event the varied date, time or period shall be of the essence. 

 

	4.3	Equitable Relief 

 The parties agree that irreparable harm will occur for which money damages will not be
an adequate remedy at Law in the event that any of the provisions of this Agreement are not performed by the Securityholders in accordance with their terms or are otherwise breached. It is accordingly agreed that Aastra and Mitel shall be entitled
to an injunction or injunctions and other equitable relief to prevent breaches or threatened breaches of the provisions of this Agreement by the Securityholders and shall be entitled to obtain specific performance by the Securityholders of any such
provisions. The Securityholders hereby agree not to seek the posting of any security bond or other assurance in respect of such injunctive or other equitable relief. Such remedies will not be the exclusive remedies for any breach of this Agreement
and will be in addition to all other remedies available at Law or equity. 
  

	4.4	Fiduciary Duties 

 Aastra and Mitel acknowledge that the Securityholders are not making any agreement or
understanding herein in any capacity other than in their capacity as securityholders of Mitel. Nothing herein shall restrict the Securityholders from taking in good faith any actions necessary to discharge such securityholders’ fiduciary duties
as a director or officer of Mitel. 
  

	4.5	Waiver; Amendment 

 Each party hereto agrees and confirms that any provision of this Agreement may be
amended or waived if, and only if, such amendment or waiver is in writing and signed, in the case of an amendment, by the Securityholders, Aastra and Mitel or in the case of a waiver, by the party against whom the waiver is to be effective and no
failure or delay by any party in exercising any right, power or privilege hereunder shall operate as a waiver thereof nor shall any single or partial exercise thereof preclude any other or further exercise. 

  
 - 10 - 

	4.6	Entire Agreement 

 This Agreement constitutes the entire agreement among the parties with respect to the
subject matter hereof and supersedes all prior agreements and understandings among the parties with respect thereto. 
  

	4.7	Notices 

 Any notice, consent or approval required or permitted to be given in connection with
this Agreement (in this Section referred to as a “Notice”) shall be in writing and shall be sufficiently given if delivered (whether in person, by courier service or other personal method of delivery), or if transmitted by facsimile
or e-mail: 
  

	 	(a)	if to Mitel: 

 Mitel Networks Corporation 

350 Legget Drive 
 Kanata, ON,
Canada K2K 2W7 
  

			
	Attention:	  	Steve Spooner
	Facsimile:	  	(613) 592-7807
	Email:	  	steve_spooner@mitel.com

 with a copy (which shall not constitute notice) to: 

Osler, Hoskin & Harcourt LLP 

1 First Canadian Place, Suite 6600 

Toronto, Ontario M5X 1B8 
  

			
	Attention:	  	Craig Wright and Jeremy Fraiberg
	Facsimile:	  	(416) 862-6666
	Email:	  	cwright@osler.com and jfraiberg@osler.com

  

	 	(b)	if to Aastra: 

 Aastra Technologies Limited 

155 Snow Boulevard 
 Concord,
Ontario, Canada L4K 4N9 
  

			
	Attention:	  	Francis Shen
	Facsimile:	  	(905) 760-4238
	Email:	  	fshen@aastra.com

 with a copy (which shall not constitute notice) to: 

McCarthy Tétrault LLP 

Suite 5300, TD Bank Tower 
 Box
48, 66 Wellington Street West 
 Toronto ON M5K 1E6 

  
 - 11 - 

			
	Attention:	  	Gary Girvan and George Takach
	Facsimile:	  	(416) 868-0673
	Email:	  	ggirvan@mccarthy.ca and gtakach@mccarthy.ca

  

	 	(c)	if to the Securityholder: 

 One Letterman Drive 

Building C—Suite 410 
 San
Francisco, California 94129 
 Attention: Ben Ball 

Facsimile: (415) 418-2900 

E-mail: ball@franciscopartners.com 

With a copy to: 

Shearman & Sterling LLP 

Four Ebarcadero Center 
 San
Francisco, California 94111-5994 
 Attention: Michael J. Kennedy 

Facsimile: (415) 616-1100 

E-mail: mkennedy@shearman.com 
 Any Notice
delivered or transmitted to a party as provided above shall be deemed to have been given and received on the day it is delivered or transmitted, provided that it is delivered or transmitted on a Business Day prior to 5:00 p.m. local time in the
place of delivery or receipt. If the Notice is delivered or transmitted after 5:00 p.m. local time or if the day is not a Business Day, then the Notice shall be deemed to have been given and received on the next Business Day. 

Either party hereto may, from time to time, change its address by giving Notice to the other parties in accordance with the provisions of this Section 4.7.

  

	4.8	Severability 

 If, in any jurisdiction, any provision of this Agreement or its application to any party
or circumstance is restricted, prohibited or unenforceable, such provision shall, as to such jurisdiction, be ineffective only to the extent of such restriction, prohibition or unenforceability without invalidating the remaining provisions of this
Agreement and without affecting the validity or enforceability of such provision in any other jurisdiction or without affecting its application to other parties or circumstances. Upon such determination that any term or other provision is invalid,
illegal or incapable of being enforced, the parties hereto shall negotiate in good faith to modify this Agreement so as to effect the original intent of the parties as closely as possible in a mutually acceptable manner in order that the terms of
this Agreement remain as originally contemplated to the fullest extent possible. 

  
 - 12 - 

	4.9	Successors and Assigns 

 The provisions of this Agreement shall be binding upon and enure to the benefit
of the parties hereto and their respective successors, permitted assigns and legal personal representatives, provided that no party may assign, delegate or otherwise transfer any of its rights, interests or obligations under this Agreement without
the prior written consent of the other parties hereto, except that Aastra may assign, delegate or otherwise transfer any of its rights, interests or obligations under this Agreement to an Affiliate without reducing its own obligations hereunder
without the consent of the Securityholders. 
  

	4.10	Expenses 

 Each party shall pay all costs and expenses (including the fees and disbursements of legal
counsel and other advisers) it incurs in connection with the negotiation, preparation and execution of this Agreement and the transactions contemplated by this Agreement. 
  

	4.11	Independent Legal Advice 

 The Securityholders acknowledge that they have been afforded the opportunity
to obtain independent legal advice and confirm by the execution of this Agreement that they have either done so or waived its right to do so in connection with the entering into of this Agreement. 

 

	4.12	Further Assurances 

 The parties hereto shall, with reasonable diligence, do all things and provide all
such reasonable assurances as may be required to consummate the transactions contemplated by this Agreement, and each party shall provide such further documents or instruments required by the other party as may be reasonably necessary or desirable
to effect the purpose of this Agreement and carry out its provisions, whether before or after the Effective Time. 
  

	4.13	Execution and Delivery 

 This Agreement may be executed in one or more counterparts, each of which shall
be deemed to be an original but all of which together shall constitute one and the same instrument. The Parties shall be entitled to rely upon delivery of an executed facsimile or similar executed electronic copy of this Agreement, and such
facsimile or similar executed electronic copy shall be legally effective to create a valid and binding agreement between the Parties. 

[Signature page follows.] 

  
 - 13 - 

 IN WITNESS OF WHICH the parties have executed this Agreement. 

 

					
	AASTRA TECHNOLOGIES LIMITED
		
	By:	 	 /s/ Anthony Shen

		 	Name:	 	Anthony Shen
			
		 	Title:	 	Co-Chief Executive Officer
	
	MITEL NETWORKS CORPORATION
		
	By:	 	 /s/ Steve Spooner

		 	Name:	 	Steve Spooner
			
		 	Title:	 	Chief Financial Officer
	
	ARSENAL HOLDCO I, S.A.R.L.
		
	By:	 	 /s/ Benjamin Ball

		 	Name:	 	Benjamin Ball
			
		 	Title:	 	Partner
	
	ARSENAL HOLDCO II, S.A.R.L.
		
	By:	 	 /s/ Benjamin Ball

		 	Name:	 	Benjamin Ball
			
		 	Title:	 	Partner

  
 - 14 - 

 SCHEDULE “A” 

 

							
	 Registered Owner
	  	 Beneficial Owner
	  	Mitel Shares	 
	 Arsenal Holdco I, S.A.R.L.
	  	 Arsenal Holdco I, S.A.R.L.
	  	 	14,508,268	  
	 Arsenal Holdco II, S.A.R.L.
	  	 Arsenal Holdco II, S.A.R.L.
	  	 	5,589,278	  

  
 A-1 

 SCHEDULE “B” 

FORM OF WRITTEN CONSENT 

(see attached) 

 WRITTEN CONSENT 

 

			
	TO:	  	 TORONTO STOCK EXCHANGE
  

NASDAQ GLOBAL MARKET

		
	FROM:	  	 KANATA RESEARCH PARK CORPORATION
  

ARSENAL HOLDCO I S.A.R.L.
  

ARSENAL HOLDCO II S.A.R.L.

 WHEREAS Kanata Research Park Corporation (“Kanata”) beneficially owns 12,080,610 common shares of
Mitel Networks Corporation (“Mitel”) as of the date hereof, representing voting ownership of approximately 22.4% of the outstanding Mitel common shares (“Mitel Shares”); 

AND WHEREAS Arsenal Holdco I S.A.R.L. (“Arsenal I”) and Arsenal Holdco II S.A.R.L. (“Arsenal II”, and together with
Arsenal I, “Arsenal”) collectively beneficially own 20,097,546 Mitel Shares as of the date hereof, representing voting ownership of approximately 37.3% of the outstanding Mitel Shares, and together with Kanata, 59.7% of the
outstanding Mitel Shares; 
 AND WHEREAS on November 10, 2013, Mitel entered into an arrangement agreement with Aastra
Technologies Limited (“Aastra”) pursuant to which Mitel has agreed to acquire all of the outstanding common shares of Aastra by way of an arrangement under the Canada Business Corporations Act (the
“Arrangement”) for consideration consisting of cash and Mitel Shares; 
 AND WHEREAS Mitel expects to issue up
to approximately — million Mitel Shares in connection with the Arrangement, representing approximately —% of the total number of outstanding
Mitel Shares as of the date hereof, consisting of: (i) approximately — million Mitel Shares to be issued to Aastra shareholders; and (ii) up to approximately — Mitel Shares to be issued upon exercise of replacement options to be issued to holders of Aastra options in exchange for such options; 

AND WHEREAS upon completion of the Arrangement: (i) Kanata will have voting ownership of approximately 12.8% of the outstanding Mitel Shares;
(ii) Arsenal will have voting ownership of approximately 21.3% of the outstanding Mitel Shares; (iii) Mitel shareholders, other than Kanata and Arsenal, will hold approximately 22.9% of the outstanding Mitel Shares; and (iv) former
Aastra shareholders will hold approximately 43% of the outstanding Mitel Shares; 
 AND WHEREAS each of Kanata, Arsenal I and Arsenal II
acknowledge that the Arrangement will likely be completed during the first quarter of 2014 and, in any event, no later than March 14, 2014; 

 AND WHEREAS each of Kanata, Arsenal I and Arsenal II are familiar with the terms of the Arrangement;

 AND WHEREAS as the number of Mitel Shares to be issued in connection with the Arrangement (the “Mitel Share Issuance”)
exceeds 25% of the total number of outstanding Mitel Shares, the Mitel Share Issuance requires the approval of Mitel shareholders under section 611(c) of the TSX Company Manual; 

AND WHEREAS as the Mitel Shares Issuance exceeds 20% of the total number of outstanding Mitel Shares, the Mitel Share Issuance requires the approval of
Mitel shareholders under Rule 5635(a)(1)(A) of the NASDAQ Stock Market Rules (the “NASDAQ Rules”), absent the availability of an exemption therefrom; 

AND WHEREAS this Notice is being submitted to the TSX under section 604(d) of the TSX Company Manual and under Rule 5635(e)(4) of
the NASDAQ Rules as written evidence of the required shareholder approval of the Mitel Share Issuance; 
 NOW THEREFORE each of Kanata,
Arsenal I and Arsenal II confirms that it is in favour of the Arrangement and irrevocably consents to the Mitel Share Issuance. 

[The remainder of this page is left blank intentionally] 

  
 - 2 - 

 DATED this     day of November, 2013. 

 

			
	KANATA RESEARCH PARK CORPORATION
		
	by:	 	  

		 	Name:
		 	Title:
	
	ARSENAL HOLDCO I S.A.R.L.
		
	by:	 	  

		 	Name:
		 	Title:
	
	ARSENAL HOLDCO II S.A.R.L.
		
	by:	 	  

		 	Name:
		 	Title:

  
 - 3 -

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