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<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>As filed with the United States Securities and Exchange Commission on November&nbsp;26, 2007</B>
</DIV>


<DIV align="right" style="font-size: 10pt; margin-top: 12pt">Registration No.&nbsp;333-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</DIV>


<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
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<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>Washington, D.C. 20549</B>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM S-8</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>REGISTRATION STATEMENT<BR>
UNDER<BR>
THE SECURITIES ACT OF 1933</B>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>MITEL NETWORKS CORPORATION/<BR>
CORPORATION MITEL NETWORKS</B>
</DIV>

<DIV align="center" style="font-size: 10pt"><I>(Exact name of registrant as specified in its charter)</I></DIV>


<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>MITEL NETWORKS CORPORATION</B>
</DIV>

<DIV align="center" style="font-size: 10pt"><I>(Translation of Registrant&#146;s name into English)</I></DIV>


<DIV align="center">
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    <TD width="47%">&nbsp;</TD>
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<TR valign="bottom">
    <TD align="center" valign="top"><B>Canada</B><BR>
<I>(State or other jurisdiction of incorporation or <BR>
organization)</I>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B><I>N/A</I></B><BR>
<I>(IRS Employer Identification No.)</I></TD>
</TR>
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</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>350 Legget Drive<BR>
Ottawa, Ontario, Canada K2K 2W7<BR>
(613)&nbsp;592-2122</B><BR>
<I>(Address of Registrant&#146;s Principal Executive Offices and telephone number)</I></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>Mitel Networks Corporation 2007 U.S. Employee Stock Purchase Plan</B><BR>
<I>(Full title of the plan)</I></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B><I>Copy to:</I></B></DIV>

<DIV align="center">
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    <TD width="40%">&nbsp;</TD>
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<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><B>Sandra Cohen</B></DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"><B>John Gardner</B></TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><B>Osler, Hoskin &#038; Harcourt LLP</B>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"><B>Senior Vice-President and</B></TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"><B>Corporate Counsel</B></TD>
</TR>
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><B>620
8</B><SUP style="font-size: 85%; vertical-align: text-top"><B>th</B></SUP>
<B>Avenue,
36</B><SUP style="font-size: 85%; vertical-align: text-top"><B>th</B></SUP>
<B>floor</B>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"><B>Inter-Tel (Delaware),</B></TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"><B>Incorporated</B></TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><B>New York, New York 10018</B>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"><B>1615 South
52</B><SUP style="font-size: 85%; vertical-align: text-top"><B>nd</B></SUP>
<B>Street</B></TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><B>(212)&nbsp;991-2508</B>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"><B>Tempe, Arizona 85281</B></TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"><B>(480)&nbsp;449-8900</B></TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"><I>(Name, address and telephone</I></TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"><I>number of agent for service)</I></TD>
</TR>
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</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>CALCULATION OF REGISTRATION FEE</B></DIV>

<DIV align="center">
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    <TD width="2%">&nbsp;</TD>
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    <TD width="2%">&nbsp;</TD>
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    <TD width="1%">&nbsp;</TD>

    <TD width="1%">&nbsp;</TD>
</TR><TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="21" style="border-bottom: 3px double #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Proposed Maximum</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Proposed Maximum</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
<TD width="1%">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Offering Price</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Aggregate Offering</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Amount of</B></TD>
    <TD>&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="CENTER"><B>Title of Securities to be Registered</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Amount to be Registered</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Per Share (2)</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Price (2)</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Registration Fee</B></TD>
    <TD>&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>

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    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
                    <TD style="border-top: 2px solid #000000"><DIV style="margin-left:15px; text-indent:-15px">Common Shares, without nominal or par value</DIV></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD colspan="3" align="center" style="border-top: 2px solid #000000">15,000,000 shares (1)</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="left" style="border-top: 2px solid #000000">$</TD>
    <TD align="right" style="border-top: 2px solid #000000">1.32</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="left" style="border-top: 2px solid #000000">$</TD>
    <TD align="right" style="border-top: 2px solid #000000">19,800,000</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="left" style="border-top: 2px solid #000000">$</TD>
    <TD align="right" style="border-top: 2px solid #000000">607.86</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="21" style="border-top: 3px double #000000">&nbsp;</TD>
</TR>

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</DIV>



<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">(1)</TD>
    <TD>&nbsp;</TD>
    <TD>Pursuant to Rule&nbsp;416 (a)&nbsp;under the Securities Act of 1933, as amended,
this Registration Statement covers any additional securities that may
be offered or issued as a result of the anti-dilution provisions in
the Employee Stock Purchase Plan.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(2)</TD>
    <TD>&nbsp;</TD>
    <TD>Estimated solely for the purpose of calculating the amount of the
registration fee, in accordance with Rule&nbsp;457(h)(1) under the
Securities Act of 1933, as amended.</TD>
</TR>

</TABLE>



<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>




</DIV>
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<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>PART I</B></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS</B></DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Registration Statement on Form S-8 is being filed for the purpose of registering an
additional 15,000,000 Common Shares of Mitel Networks Corporation (the &#147;Registrant&#148;) issuable
pursuant to the Registrant&#146;s Employee Stock Purchase Plan (the &#147;Plan&#148;). We will send or give the
documents containing the information specified in Part&nbsp;1 of Form S-8 to employees eligible to
participate under the Plan, as specified by Rule&nbsp;428 (b)(1) promulgated by the Securities and
Exchange Commission (the &#147;Commission&#148;) and the Securities Act of 1933, as amended (the &#147;Securities
Act&#148;). All information specified by Part&nbsp;I of Form S-8 is omitted from this Registration Statement
in accordance with Rule 424(b) of the Securities Act.
</DIV>
<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>PART II</B></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</B></DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;3. </B><U><B>Incorporation of Documents by Reference</B></U>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The following documents filed by the Registrant with the Commission are hereby incorporated by
reference and made a part of this Registration Statement:
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(a)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s Annual Report on Form 20-F for the fiscal year ended April&nbsp;30,
2007 (the &#147;2007 Form 20-F&#148;); and</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(b)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The description of the Registrant&#146;s common shares contained in Item&nbsp;10B
(Additional Information &#151; Memorandum and Articles of Incorporation &#151; Share Capital)
of the Registrant&#146;s 2007 Form 20-F.</TD>
</TR>

</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In addition, all documents subsequently filed by the Registrant pursuant to Sections&nbsp;13(a),
13(c), 14 and 15(d) of the Securities Exchange Act of 1934 (the &#147;Exchange Act&#148;) on or after the
date of this Registration Statement and prior to the filing of a post-effective amendment to this
Registration Statement which indicates that all securities registered hereby have been sold or
which deregisters such securities then remaining unsold shall be deemed to be incorporated by
reference in this Registration Statement and to be a part hereof from the date of filing of such
documents, except for information furnished to the Commission that is not deemed to be &#147;filed&#148; for
purposes of the Exchange Act (such documents, and the documents listed above, being hereinafter
referred to as &#147;Incorporated Documents&#148;). Any statement contained in an Incorporated Document shall
be deemed to be modified or superseded for purposes of this Registration Statement to the extent
that a statement contained herein or in any other subsequently filed Incorporated Document modifies
or supersedes such statement. Any such statement so modified or superseded shall not be deemed,
except as so modified or superseded, to constitute a part of this Registration Statement.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;4. </B><U><B>Description of Securities</B></U>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Registrant&#146;s common shares are registered under Section&nbsp;12 of the Exchange Act.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;5. </B><U><B>Interests of Named Experts and Counsel</B></U>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The validity of the common shares which are registered hereby and which may be issued by the
Registrant pursuant to the Plan will be passed upon by Gregory J. Hiscock, Esq., General Counsel
and Corporate Secretary of the Registrant. Greg Hiscock is regularly employed by the Registrant.
</DIV>

</DIV>
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<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;6. </B><U><B>Indemnification of Directors and Officers</B></U>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The by-laws of the Registrant generally provide that the Registrant shall indemnify a director
or officer against liability incurred in such capacity including acting at the Registrant&#146;s request
as director or officer of another corporation, to the extent permitted by the Canada Business
Corporations Act. The Registrant maintains directors and officers liability insurance in the amount
of $15,000,000 for the benefit of directors and officers of the Registrant. The policy contains a
deductible ranging from $50,000 to $75,000 depending upon the nature of the claim. The policy
contains a number of exclusions and limitations to the coverage provided, as a result of which the
Registrant may, under certain circumstances, be obligated to indemnify its directors or officers
for certain claims which do not fall within the coverage provided under the policy.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Canada Business Corporations Act provides as of right that, in general, an officer or
director, as such, shall be entitled to indemnity if (i)&nbsp;he was not judged by a court or competent
authority to have committed any fault or omitted to do anything he ought to have done, (ii)&nbsp;he
acted honestly and in good faith with a view to the best interests of the corporation and (iii)
where a criminal or administrative action or proceeding that is enforced by a monetary penalty, he
had reasonable grounds for believing that his conduct was lawful. However, under the Canada
Business Corporations Act, no officer or director of the Registrant may be indemnified with respect
to any security holder&#146;s derivative action brought pursuant to such Act unless a court of competent
jurisdiction has approved the terms of such indemnification.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;7. </B><U><B>Exemption from Registration Claimed</B></U>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not applicable.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;8. </B><U><B>Exhibits</B></U>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;See &#147;Exhibit&nbsp;Index&#148; below.
</DIV>
</DIV>
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<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;9. </B><U><B>Undertakings</B></U>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a)&nbsp;The Registrant hereby undertakes:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) To file, during any period in which offers or sales are being made, a post-effective
amendment to this Registration Statement:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 4%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) To include any prospectus required by Section&nbsp;10(a)(3) of the Securities Act;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 4%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) To reflect in the prospectus any facts or events arising after the effective date
of the registration statement (or the most recent post-effective amendment thereof) which,
individually or in the aggregate, represent a fundamental change in the information set
forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease
in volume of securities offered (if the total dollar value of securities offered would not
exceed that which was registered) and any deviation from the low or high and of the
estimated maximum offering range may be reflected in the form of prospectus filed with the
Commission pursuant to Rule 424(b) if, in the aggregate, the change in volume and price
represents no more than 20% change in the maximum aggregate offering price set forth in the
&#147;Calculation of Registration Fee&#148; table in the effective Registration Statement; and
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 4%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) To include any material information with respect to the plan of distribution not
previously disclosed in this Registration Statement or any material change to such
information in this Registration Statement;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 4%"><U>provided</U>, <U>however</U>, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if
the information required to be included in a post-effective amendment by those paragraphs is
contained in periodic reports filed by the Registrant pursuant to Section 13(a) or 15(d) of
the Exchange Act that are incorporated by reference in this Registration Statement.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) That, for the purpose of determining any liability under the Securities Act, each such
post-effective amendment shall be deemed to be a new registration statement relating to the
securities offered therein, and the offering of such securities at the time shall be deemed to
be the initial <U>bona</U> <U>fide</U> offering thereof.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) To remove from registration by means of a post-effective amendment any of the
securities being registered which remain unsold at the termination of the offering.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)&nbsp;The undersigned Registrant hereby undertakes that, for purposes of determining any
liability under the Securities Act of 1933, each filing of the Registrant&#146;s annual report pursuant
to Section 13(a) or Section 15(d) of the Exchange Act that is incorporated by reference in this
Registration Statement shall be deemed to be a new Registration Statement relating to the
securities offered therein, and the offering of such securities at that time shall be deemed to be
the initial <U>bona</U> <U>fide</U> offering thereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c)&nbsp;Insofar as indemnification for liabilities arising under the Securities Act may be
permitted to directors, officers and controlling persons of the Registrant pursuant to the
foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the
Securities and Exchange Commission such indemnification is against public policy as expressed in
the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses incurred or paid by
a director, officer or controlling person of the Registrant in the successful defense of any
action, suit or proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the Registrant will, unless in the opinion of its
counsel the matter has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public policy as expressed
in the Securities Act and will be governed by the final adjudication of such issue.
</DIV>
</DIV>
<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">
<P align="center" style="font-size: 10pt"><!-- Folio -->-5-<!-- /Folio -->

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SIGNATURES</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it
has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and
has duly caused this registration statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of Ottawa, Canada, on the 26&nbsp;day of November, 2007.
</DIV>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left"><B>MITEL NETWORKS CORPORATION /<BR>
CORPORATION MITEL NETWORKS</B><BR>
(Registrant)<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left"><I>&#147;Donald Smith&#148;</I>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Donald W. Smith,&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Chief Executive Officer&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>POWER OF ATTORNEY</B>
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below constitutes and
appoints Donald W. Smith and Steven Spooner, and each of them, his true and lawful
attorneys-in-fact and agents, each with full power of substitution and resubstitution, for him and
in his name, place and stead, in any and all capacities, to sign any and all amendments (including
post-effective amendments), to this Registration Statement on Form S-8, and to file the same, with
exhibits thereto and other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary to be done, as
fully to all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that each of said attorneys-in-fact and agents or their substitutes may lawfully do
or cause to be done by virtue hereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act, this registration statement has been
signed below by the following persons in the capacities indicated, on
the 26&nbsp;day of November, 2007.
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head --><TR valign="bottom">
    <TD width="45%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="45%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>SIGNATURE</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="LEFT" style="border-bottom: 1px solid #000000"><B>TITLE</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" nowrap valign="top"><DIV style="margin-left:15px; text-indent:-15px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="LEFT" nowrap valign="top"><I>&#147;Terence Matthews&#148;</I>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Dr. Terence H. Matthews</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Chairman and Director</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="LEFT" nowrap valign="top"><I>&#147;Donald Smith&#148;</I>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Donald W. Smith</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Chief Executive Officer and Director (principal
executive officer)</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="LEFT" nowrap valign="top"><I>&#147;Steven Spooner&#148;</I>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Steven E. Spooner</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Chief Financial Officer (principal financial
officer and principal accounting officer)</TD>
</TR>
<!-- End Table Body --></TABLE>
</DIV>

</DIV>
<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">
<P align="center" style="font-size: 10pt"><!-- Folio -->-6-<!-- /Folio -->
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head --><TR valign="bottom">
    <TD width="45%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="45%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>SIGNATURE</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="LEFT" style="border-bottom: 1px solid #000000"><B>TITLE</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="LEFT" nowrap valign="top"><I>&#147;Peter Charbonneau&#148;</I>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Peter D. Charbonneau</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Lead Director</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="LEFT" nowrap valign="top"><I>&#147;Benjamin Ball&#148;</I>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Benjamin H. Ball</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="LEFT" nowrap valign="top"><I>&#147;David ibnAle&#148;</I>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
David T. ibnAle</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="LEFT" nowrap valign="top"><I>&#147;Gilbert Palter&#148;</I>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Gilbert S. Palter</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="LEFT" nowrap valign="top"><I>&#147;Thomas Ludwig&#148;</I>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Thomas L. Ludwig</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="LEFT" nowrap valign="top"><I>&#147;Norman Stout&#148;</I>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Norman Stout</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="LEFT" nowrap valign="top"><I>&#147;Jean-Paul Cossart&#148;</I>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Jean-Paul Cossart</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">
Director</TD>
</TR>
<!-- End Table Body --></TABLE>
</DIV>

</DIV>
<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">
<P align="center" style="font-size: 10pt"><!-- Folio -->-7-<!-- /Folio -->
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head --><TR valign="bottom">
    <TD width="45%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="45%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>SIGNATURE</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="LEFT" style="border-bottom: 1px solid #000000"><B>TITLE</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="LEFT" nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="LEFT" nowrap valign="top"><I>&#147;John Gardner&#148;</I>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Name:  John Gardner<BR>
Title: Senior Vice-President and Corporate Counsel<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Inter-Tel (Delaware), Incorporated</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Authorized Representative in the United States</TD>
</TR>
<!-- End Table Body --></TABLE>
</DIV>

</DIV>
<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">
<P align="center" style="font-size: 10pt"><!-- Folio -->-8-<!-- /Folio -->

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>EXHIBIT INDEX</B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head --><TR valign="bottom">
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="4%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="80%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>Exhibit No</B>.</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Description</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.1</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Articles of Incorporation and amendments thereto prior to April&nbsp;22, 2004 (3)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.2</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Articles of Amendment dated April&nbsp;22, 2004 (3)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.3</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Articles of Amendment dated April&nbsp;23, 2004 (3)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.4</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Articles of Amendment dated October&nbsp;12, 2006 (5)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.5</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Articles of Amendment dated August&nbsp;16, 2007 (6)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.6</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Articles of Amendment dated August&nbsp;16, 2007 (1)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.7</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Specimen Common Share certificate (1)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.8</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Specimen Series&nbsp;A Share certificate (3)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.9</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Specimen Series&nbsp;B Share certificate (3)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.10</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Specimen Class&nbsp;1 Share Certificate (1)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.11</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Securities Purchase Agreement between Mitel and the Noteholders, dated April&nbsp;27, 2005 (6)&#043;&#043;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.12</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Form of Note (See Exhibit&nbsp;4.9 above)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.13</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">General Security Agreement between Mitel and Highbridge (as a secured party, and
also in its capacity as Collateral Agent (now BNY) on behalf of the Noteholders), dated
April&nbsp;27, 2005 (4)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.14</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Guaranty and Security Agreement between MNI and Highbridge (as a secured party, and
also in its capacity as Collateral Agent (now BNY) on behalf of the Noteholders), dated
April&nbsp;27, 2005 (6)&#043;&#043;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.15</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Pledge Agreement between MNL and Highbridge (as a secured party, and also in its
capacity as Collateral Agent (now BNY) on behalf of the Noteholders), dated April&nbsp;27,
2005 (4)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.16</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Charge Over Book Debts and Cash at Bank between MNL and Highbridge (as a secured
party, and also in its capacity as Collateral Agent (now BNY) on behalf of the
Noteholders), dated April&nbsp;27, 2005 (5)&#043;&#043;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.17</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Guarantee and Indemnity between MNL and Highbridge (as a secured party, and also in
its capacity as Collateral Agent (now BNY) on behalf of the Noteholders), dated April&nbsp;27,
2005 (4)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.18</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Mortgage Debenture between MNL and Highbridge (as a secured party, and also in its
capacity as Collateral Agent (now BNY) on behalf of the Noteholders), dated April&nbsp;27,
2005 (4)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.19</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Guarantee and Security Agreement between MNOL and Highbridge (as a secured party,
and also in its capacity as Collateral Agent (now BNY) on behalf of the Noteholders),
dated June&nbsp;30, 2005 (4)</DIV></TD>
</TR>
<!-- End Table Body --></TABLE>
</DIV>

</DIV>
<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">
<P align="center" style="font-size: 10pt"><!-- Folio -->-9-<!-- /Folio -->
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head --><TR valign="bottom">
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="4%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="80%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>Exhibit No</B>.</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Description</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.20</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Deed of Guarantee and Subordination between MNIL, MNOL and Highbridge (as a secured
party, and also in its capacity as Collateral Agent (now BNY) on behalf of the
Noteholders), dated June&nbsp;30, 2005 (2)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.21</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Deed of Guarantee and Subordination between MNIL, MNOL and BNY, dated July&nbsp;15, 2005 (2)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.22</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Intellectual Property Security Agreement between Mitel and BNY, effective from April&nbsp;27, 2005 (2)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.23</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Class&nbsp;A Convertible Preferred Share Subscription Agreement between Mitel and EdgeStone dated April&nbsp;23, 2004 (5)&#043;&#043;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.24</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Form of Warrant (See Exhibit4.21 above) (5)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.25</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Securities Purchase Agreement between Mitel and Wesley Clover Corporation dated September&nbsp;21, 2006 (5)&#043;&#043;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.26</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Form of Warrant (See Exhibit&nbsp;4.23 above) (5)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.27</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Termination Agreement between Mitel, Zarlink, PTIC EdgeStone, Dr.&nbsp;Matthews, Wesley Clover and CTJL dated August&nbsp;16, 2007 (1)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.28</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">First Lien Credit Agreement among Mitel, Mitel US Holdings Inc., certain lenders,
Morgan Stanley Senior Funding, Inc., Morgan Stanley &#038; Co, Incorporated and Merrill Lynch,
Pierce, Fenner &#038; Smith Incorporated dated August&nbsp;16, 2007 (1)&#043;&#043;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.29</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Second Lien Credit Agreement among Mitel, Mitel US Holdings Inc., certain lenders,
Morgan Stanley Senior Funding, Inc., Morgan Stanley &#038; Co, Incorporated and Merrill Lynch,
Pierce, Fenner &#038; Smith Incorporated dated August&nbsp;16, 2007 (1)&#043;&#043;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.30</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Class&nbsp;I Convertible Preferred Share Subscription Agreement among Mitel, Arsenal
Holdco I, s.a.r.l., Arsenal Holdco II, s.a.r.l. and Morgan Stanley Principal Investors
Inc. dated August&nbsp;16, 2007 (1)&#043;&#043;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.31</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Form of Warrant granted to Arsenal Holdco I, s.a.r.l., Arsenal Holdco II, s.a.r.l.,
Morgan Stanley Principal Investors Inc., PTIC and Dr.&nbsp;Matthews (6)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.32</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Shareholder Agreement among Mitel, PTIC, Dr.&nbsp;Matthews, Wesley Clover, CTJL,
EdgeStone, Arsenal Holdco I, s.a.r.l., Arsenal Holdco II, s.a.r.l. and Morgan Stanley
Principal Investors Inc. dated August&nbsp;16, 2007 (7)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.33</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Registration Rights Agreement among Mitel, Arsenal Holdco I, s.a.r.l., Arsenal
Holdco II, s.a.r.l. and Morgan Stanley Principal Investors Inc. dated
August&nbsp;16, 2007 (7)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.34</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Mitel Networks Corporation 2007 Employee Stock Purchase Plan</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">5.1</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Opinion of Gregory J. Hiscock, Esq.</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">23.1</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Consent of Gregory J. Hiscock, Esq. (included in Exhibit&nbsp;5.1)</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">23.2</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Consent of Deloitte &#038; Touche LLP</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">24.1</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Powers of Attorney (included in signature page to this Registration Statement)</DIV></TD>
</TR>
<!-- End Table Body --></TABLE>
</DIV>

</DIV>
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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">
<P align="center" style="font-size: 10pt"><!-- Folio -->-10-<!-- /Folio -->


<DIV align="left">
<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" nowrap align="left">(1)</TD>
    <TD width="3%">&nbsp;</TD>
    <TD>Filed on October&nbsp;24, as an exhibit to the annual report on Form 20-F of Mitel for the
year ended April&nbsp;30, 2007, and incorporated herein by reference.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(2)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Filed on May&nbsp;3, 2004 as an exhibit to a Schedule&nbsp;13D (Mitel as issuer) by EdgeStone
Capital Equity Fund II-A, L.P.; EdgeStone Capital Equity Fund II-US, L.P.; EdgeStone
Capital Equity Fund II-US-Inst., L.P.; National Bank Financial &#038; Co. Inc.; EdgeStone
Capital Equity Fund II-A GP, L.P.; EdgeStone Capital Equity Fund II US GP, L.P.; EdgeStone
Capital Equity Fund II-US-Inst. GP, L.P.; EdgeStone Capital Equity Fund II-A GP, Inc.;
EdgeStone Capital Equity Fund II-US Main GP, Inc.; EdgeStone Capital Equity Fund
II-US-Inst. GP, Inc.; Samuel L. Duboc; Gilbert S. Palter; Bryan W. Kerdman; Sandra Cowan;
and EdgeStone Capital Equity Fund II-B GP, Inc. and incorporated herein by reference.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(3)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Filed on August&nbsp;31, 2004 as an exhibit to the annual report on Form 20-F of Mitel for
the year ended April&nbsp;25, 2004, and incorporated herein by reference.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(4)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Filed on October&nbsp;24, 2005 as an exhibit to the annual report on Form 20-F of Mitel for
the year ended April&nbsp;24, 2005 and the transition period ended April&nbsp;30, 2005 and
incorporated therein by reference.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(5)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Filed on October&nbsp;30, 2006 as an exhibit to the annual report on Form 20-F of Mitel for
the year ended April&nbsp;30, 2006 and incorporated therein by reference.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(6)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Filed as an exhibit to Amendment No.&nbsp;2 to the Schedule&nbsp;13D (the Registrant as issuer)
filed with the Commission on August&nbsp;27, 2007 by Arsenal Holdco I, S.A.R.L., Arsenal Holdco
II, S.A.R.L., Francisco Partners GP II (Cayman), L.P., Francisco Partners GP II Management
(Cayman) Limited, Francisco Partners Gp II, L.P., Francisco Partners II (Cayman), L.P., and
Francisco Partners Parallel Fund II, L.P. and incorporated therein by reference.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(7)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Filed as an exhibit to Amendment No.&nbsp;2 to the Schedule&nbsp;13D (the Registrant as issuer)
filed with the Commission on September&nbsp;28, 2007 by Terence H. Matthews, Wesley Clover
Corporation and Celtic Tech Jet Limited and incorporated therein by reference.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR>
<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">&#043;</TD>
    <TD width="1%">&nbsp;</TD>
<TD>Portions of this document have been granted &#147;Confidential Treatment&#148; by the Secretary of the
Securities and Exchange Commission.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">&#043;&#043;</TD>
    <TD width="3%">&nbsp;</TD>
<TD>Portions of this document are subject to a pending Confidential Treatment Request filed with the
Secretary of the Securities and Exchange Commission and have been filed separately with the
Securities and Exchange Commission.</TD>
</TR>

</TABLE>
</DIV>

<P align="center" style="font-size: 10pt"><!-- Folio --><!-- /Folio -->
</DIV>



</BODY>
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[{"type": "S-8", "sequence": "1", "filename": "y43174sv8.htm", "description": "FORM S-8", "secsgml_size_bytes": 57778}]
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S-8
As filed with the United States Securities and Exchange Commission on November 26, 2007
Registration No. 333-
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933
MITEL NETWORKS CORPORATION/
CORPORATION MITEL NETWORKS
(Exact name of registrant as specified in its charter)
MITEL NETWORKS CORPORATION
(Translation of Registrant's name into English)
Canada
(State or other jurisdiction of incorporation or
organization)
N/A
(IRS Employer Identification No.)
350 Legget Drive
Ottawa, Ontario, Canada K2K 2W7
(613) 592-2122
(Address of Registrant's Principal Executive Offices and telephone number)
Mitel Networks Corporation 2007 U.S. Employee Stock Purchase Plan
(Full title of the plan)
Copy to:
Sandra Cohen
John Gardner
Osler, Hoskin & Harcourt LLP
Senior Vice-President and
Corporate Counsel
620
8
th
Avenue,
36
th
floor
Inter-Tel (Delaware),
Incorporated
New York, New York 10018
1615 South
52
nd
Street
(212) 991-2508
Tempe, Arizona 85281
(480) 449-8900
(Name, address and telephone
number of agent for service)
CALCULATION OF REGISTRATION FEE
Proposed Maximum
Proposed Maximum
Offering Price
Aggregate Offering
Amount of
Title of Securities to be Registered
Amount to be Registered
Per Share (2)
Price (2)
Registration Fee
Common Shares, without nominal or par value
15,000,000 shares (1)
$
1.32
$
19,800,000
$
607.86
(1)
Pursuant to Rule 416 (a) under the Securities Act of 1933, as amended,
this Registration Statement covers any additional securities that may
be offered or issued as a result of the anti-dilution provisions in
the Employee Stock Purchase Plan.
(2)
Estimated solely for the purpose of calculating the amount of the
registration fee, in accordance with Rule 457(h)(1) under the
Securities Act of 1933, as amended.
-2-
PART I
INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS
This Registration Statement on Form S-8 is being filed for the purpose of registering an
additional 15,000,000 Common Shares of Mitel Networks Corporation (the "Registrant") issuable
pursuant to the Registrant's Employee Stock Purchase Plan (the "Plan"). We will send or give the
documents containing the information specified in Part 1 of Form S-8 to employees eligible to
participate under the Plan, as specified by Rule 428 (b)(1) promulgated by the Securities and
Exchange Commission (the "Commission") and the Securities Act of 1933, as amended (the "Securities
Act"). All information specified by Part I of Form S-8 is omitted from this Registration Statement
in accordance with Rule 424(b) of the Securities Act.
PART II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
Item 3.
Incorporation of Documents by Reference
The following documents filed by the Registrant with the Commission are hereby incorporated by
reference and made a part of this Registration Statement:
(a)
The Registrant's Annual Report on Form 20-F for the fiscal year ended April 30,
2007 (the "2007 Form 20-F"); and
(b)
The description of the Registrant's common shares contained in Item 10B
(Additional Information — Memorandum and Articles of Incorporation — Share Capital)
of the Registrant's 2007 Form 20-F.
In addition, all documents subsequently filed by the Registrant pursuant to Sections 13(a),
13(c), 14 and 15(d) of the Securities Exchange Act of 1934 (the "Exchange Act") on or after the
date of this Registration Statement and prior to the filing of a post-effective amendment to this
Registration Statement which indicates that all securities registered hereby have been sold or
which deregisters such securities then remaining unsold shall be deemed to be incorporated by
reference in this Registration Statement and to be a part hereof from the date of filing of such
documents, except for information furnished to the Commission that is not deemed to be "filed" for
purposes of the Exchange Act (such documents, and the documents listed above, being hereinafter
referred to as "Incorporated Documents"). Any statement contained in an Incorporated Document shall
be deemed to be modified or superseded for purposes of this Registration Statement to the extent
that a statement contained herein or in any other subsequently filed Incorporated Document modifies
or supersedes such statement. Any such statement so modified or superseded shall not be deemed,
except as so modified or superseded, to constitute a part of this Registration Statement.
Item 4.
Description of Securities
The Registrant's common shares are registered under Section 12 of the Exchange Act.
Item 5.
Interests of Named Experts and Counsel
The validity of the common shares which are registered hereby and which may be issued by the
Registrant pursuant to the Plan will be passed upon by Gregory J. Hiscock, Esq., General Counsel
and Corporate Secretary of the Registrant. Greg Hiscock is regularly employed by the Registrant.
-3-
Item 6.
Indemnification of Directors and Officers
The by-laws of the Registrant generally provide that the Registrant shall indemnify a director
or officer against liability incurred in such capacity including acting at the Registrant's request
as director or officer of another corporation, to the extent permitted by the Canada Business
Corporations Act. The Registrant maintains directors and officers liability insurance in the amount
of $15,000,000 for the benefit of directors and officers of the Registrant. The policy contains a
deductible ranging from $50,000 to $75,000 depending upon the nature of the claim. The policy
contains a number of exclusions and limitations to the coverage provided, as a result of which the
Registrant may, under certain circumstances, be obligated to indemnify its directors or officers
for certain claims which do not fall within the coverage provided under the policy.
The Canada Business Corporations Act provides as of right that, in general, an officer or
director, as such, shall be entitled to indemnity if (i) he was not judged by a court or competent
authority to have committed any fault or omitted to do anything he ought to have done, (ii) he
acted honestly and in good faith with a view to the best interests of the corporation and (iii)
where a criminal or administrative action or proceeding that is enforced by a monetary penalty, he
had reasonable grounds for believing that his conduct was lawful. However, under the Canada
Business Corporations Act, no officer or director of the Registrant may be indemnified with respect
to any security holder's derivative action brought pursuant to such Act unless a court of competent
jurisdiction has approved the terms of such indemnification.
Item 7.
Exemption from Registration Claimed
Not applicable.
Item 8.
Exhibits
See "Exhibit Index" below.
-4-
Item 9.
Undertakings
(a) The Registrant hereby undertakes:
(1) To file, during any period in which offers or sales are being made, a post-effective
amendment to this Registration Statement:
(i) To include any prospectus required by Section 10(a)(3) of the Securities Act;
(ii) To reflect in the prospectus any facts or events arising after the effective date
of the registration statement (or the most recent post-effective amendment thereof) which,
individually or in the aggregate, represent a fundamental change in the information set
forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease
in volume of securities offered (if the total dollar value of securities offered would not
exceed that which was registered) and any deviation from the low or high and of the
estimated maximum offering range may be reflected in the form of prospectus filed with the
Commission pursuant to Rule 424(b) if, in the aggregate, the change in volume and price
represents no more than 20% change in the maximum aggregate offering price set forth in the
"Calculation of Registration Fee" table in the effective Registration Statement; and
(iii) To include any material information with respect to the plan of distribution not
previously disclosed in this Registration Statement or any material change to such
information in this Registration Statement;
provided
,
however
, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if
the information required to be included in a post-effective amendment by those paragraphs is
contained in periodic reports filed by the Registrant pursuant to Section 13(a) or 15(d) of
the Exchange Act that are incorporated by reference in this Registration Statement.
(2) That, for the purpose of determining any liability under the Securities Act, each such
post-effective amendment shall be deemed to be a new registration statement relating to the
securities offered therein, and the offering of such securities at the time shall be deemed to
be the initial
bona
fide
offering thereof.
(3) To remove from registration by means of a post-effective amendment any of the
securities being registered which remain unsold at the termination of the offering.
(b) The undersigned Registrant hereby undertakes that, for purposes of determining any
liability under the Securities Act of 1933, each filing of the Registrant's annual report pursuant
to Section 13(a) or Section 15(d) of the Exchange Act that is incorporated by reference in this
Registration Statement shall be deemed to be a new Registration Statement relating to the
securities offered therein, and the offering of such securities at that time shall be deemed to be
the initial
bona
fide
offering thereof.
(c) Insofar as indemnification for liabilities arising under the Securities Act may be
permitted to directors, officers and controlling persons of the Registrant pursuant to the
foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the
Securities and Exchange Commission such indemnification is against public policy as expressed in
the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses incurred or paid by
a director, officer or controlling person of the Registrant in the successful defense of any
action, suit or proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the Registrant will, unless in the opinion of its
counsel the matter has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public policy as expressed
in the Securities Act and will be governed by the final adjudication of such issue.
-5-
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it
has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and
has duly caused this registration statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of Ottawa, Canada, on the 26 day of November, 2007.
MITEL NETWORKS CORPORATION /
CORPORATION MITEL NETWORKS
(Registrant)
By:
"Donald Smith"
Donald W. Smith,
Chief Executive Officer
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below constitutes and
appoints Donald W. Smith and Steven Spooner, and each of them, his true and lawful
attorneys-in-fact and agents, each with full power of substitution and resubstitution, for him and
in his name, place and stead, in any and all capacities, to sign any and all amendments (including
post-effective amendments), to this Registration Statement on Form S-8, and to file the same, with
exhibits thereto and other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary to be done, as
fully to all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that each of said attorneys-in-fact and agents or their substitutes may lawfully do
or cause to be done by virtue hereof.
Pursuant to the requirements of the Securities Act, this registration statement has been
signed below by the following persons in the capacities indicated, on
the 26 day of November, 2007.
SIGNATURE
TITLE
"Terence Matthews"
Dr. Terence H. Matthews
Chairman and Director
"Donald Smith"
Donald W. Smith
Chief Executive Officer and Director (principal
executive officer)
"Steven Spooner"
Steven E. Spooner
Chief Financial Officer (principal financial
officer and principal accounting officer)
-6-
SIGNATURE
TITLE
"Peter Charbonneau"
Peter D. Charbonneau
Lead Director
"Benjamin Ball"
Benjamin H. Ball
Director
"David ibnAle"
David T. ibnAle
Director
"Gilbert Palter"
Gilbert S. Palter
Director
"Thomas Ludwig"
Thomas L. Ludwig
Director
"Norman Stout"
Norman Stout
Director
"Jean-Paul Cossart"
Jean-Paul Cossart
Director
-7-
SIGNATURE
TITLE
"John Gardner"
Name:  John Gardner
Title: Senior Vice-President and Corporate Counsel
Inter-Tel (Delaware), Incorporated
Authorized Representative in the United States
-8-
EXHIBIT INDEX
Exhibit No
.
Description
4.1
Articles of Incorporation and amendments thereto prior to April 22, 2004 (3)
4.2
Articles of Amendment dated April 22, 2004 (3)
4.3
Articles of Amendment dated April 23, 2004 (3)
4.4
Articles of Amendment dated October 12, 2006 (5)
4.5
Articles of Amendment dated August 16, 2007 (6)
4.6
Articles of Amendment dated August 16, 2007 (1)
4.7
Specimen Common Share certificate (1)
4.8
Specimen Series A Share certificate (3)
4.9
Specimen Series B Share certificate (3)
4.10
Specimen Class 1 Share Certificate (1)
4.11
Securities Purchase Agreement between Mitel and the Noteholders, dated April 27, 2005 (6)++
4.12
Form of Note (See Exhibit 4.9 above)
4.13
General Security Agreement between Mitel and Highbridge (as a secured party, and
also in its capacity as Collateral Agent (now BNY) on behalf of the Noteholders), dated
April 27, 2005 (4)
4.14
Guaranty and Security Agreement between MNI and Highbridge (as a secured party, and
also in its capacity as Collateral Agent (now BNY) on behalf of the Noteholders), dated
April 27, 2005 (6)++
4.15
Pledge Agreement between MNL and Highbridge (as a secured party, and also in its
capacity as Collateral Agent (now BNY) on behalf of the Noteholders), dated April 27,
2005 (4)
4.16
Charge Over Book Debts and Cash at Bank between MNL and Highbridge (as a secured
party, and also in its capacity as Collateral Agent (now BNY) on behalf of the
Noteholders), dated April 27, 2005 (5)++
4.17
Guarantee and Indemnity between MNL and Highbridge (as a secured party, and also in
its capacity as Collateral Agent (now BNY) on behalf of the Noteholders), dated April 27,
2005 (4)
4.18
Mortgage Debenture between MNL and Highbridge (as a secured party, and also in its
capacity as Collateral Agent (now BNY) on behalf of the Noteholders), dated April 27,
2005 (4)
4.19
Guarantee and Security Agreement between MNOL and Highbridge (as a secured party,
and also in its capacity as Collateral Agent (now BNY) on behalf of the Noteholders),
dated June 30, 2005 (4)
-9-
Exhibit No
.
Description
4.20
Deed of Guarantee and Subordination between MNIL, MNOL and Highbridge (as a secured
party, and also in its capacity as Collateral Agent (now BNY) on behalf of the
Noteholders), dated June 30, 2005 (2)
4.21
Deed of Guarantee and Subordination between MNIL, MNOL and BNY, dated July 15, 2005 (2)
4.22
Intellectual Property Security Agreement between Mitel and BNY, effective from April 27, 2005 (2)
4.23
Class A Convertible Preferred Share Subscription Agreement between Mitel and EdgeStone dated April 23, 2004 (5)++
4.24
Form of Warrant (See Exhibit4.21 above) (5)
4.25
Securities Purchase Agreement between Mitel and Wesley Clover Corporation dated September 21, 2006 (5)++
4.26
Form of Warrant (See Exhibit 4.23 above) (5)
4.27
Termination Agreement between Mitel, Zarlink, PTIC EdgeStone, Dr. Matthews, Wesley Clover and CTJL dated August 16, 2007 (1)
4.28
First Lien Credit Agreement among Mitel, Mitel US Holdings Inc., certain lenders,
Morgan Stanley Senior Funding, Inc., Morgan Stanley & Co, Incorporated and Merrill Lynch,
Pierce, Fenner & Smith Incorporated dated August 16, 2007 (1)++
4.29
Second Lien Credit Agreement among Mitel, Mitel US Holdings Inc., certain lenders,
Morgan Stanley Senior Funding, Inc., Morgan Stanley & Co, Incorporated and Merrill Lynch,
Pierce, Fenner & Smith Incorporated dated August 16, 2007 (1)++
4.30
Class I Convertible Preferred Share Subscription Agreement among Mitel, Arsenal
Holdco I, s.a.r.l., Arsenal Holdco II, s.a.r.l. and Morgan Stanley Principal Investors
Inc. dated August 16, 2007 (1)++
4.31
Form of Warrant granted to Arsenal Holdco I, s.a.r.l., Arsenal Holdco II, s.a.r.l.,
Morgan Stanley Principal Investors Inc., PTIC and Dr. Matthews (6)
4.32
Shareholder Agreement among Mitel, PTIC, Dr. Matthews, Wesley Clover, CTJL,
EdgeStone, Arsenal Holdco I, s.a.r.l., Arsenal Holdco II, s.a.r.l. and Morgan Stanley
Principal Investors Inc. dated August 16, 2007 (7)
4.33
Registration Rights Agreement among Mitel, Arsenal Holdco I, s.a.r.l., Arsenal
Holdco II, s.a.r.l. and Morgan Stanley Principal Investors Inc. dated
August 16, 2007 (7)
4.34
Mitel Networks Corporation 2007 Employee Stock Purchase Plan
5.1
Opinion of Gregory J. Hiscock, Esq.
23.1
Consent of Gregory J. Hiscock, Esq. (included in Exhibit 5.1)
23.2
Consent of Deloitte & Touche LLP
24.1
Powers of Attorney (included in signature page to this Registration Statement)
-10-
(1)
Filed on October 24, as an exhibit to the annual report on Form 20-F of Mitel for the
year ended April 30, 2007, and incorporated herein by reference.
(2)
Filed on May 3, 2004 as an exhibit to a Schedule 13D (Mitel as issuer) by EdgeStone
Capital Equity Fund II-A, L.P.; EdgeStone Capital Equity Fund II-US, L.P.; EdgeStone
Capital Equity Fund II-US-Inst., L.P.; National Bank Financial & Co. Inc.; EdgeStone
Capital Equity Fund II-A GP, L.P.; EdgeStone Capital Equity Fund II US GP, L.P.; EdgeStone
Capital Equity Fund II-US-Inst. GP, L.P.; EdgeStone Capital Equity Fund II-A GP, Inc.;
EdgeStone Capital Equity Fund II-US Main GP, Inc.; EdgeStone Capital Equity Fund
II-US-Inst. GP, Inc.; Samuel L. Duboc; Gilbert S. Palter; Bryan W. Kerdman; Sandra Cowan;
and EdgeStone Capital Equity Fund II-B GP, Inc. and incorporated herein by reference.
(3)
Filed on August 31, 2004 as an exhibit to the annual report on Form 20-F of Mitel for
the year ended April 25, 2004, and incorporated herein by reference.
(4)
Filed on October 24, 2005 as an exhibit to the annual report on Form 20-F of Mitel for
the year ended April 24, 2005 and the transition period ended April 30, 2005 and
incorporated therein by reference.
(5)
Filed on October 30, 2006 as an exhibit to the annual report on Form 20-F of Mitel for
the year ended April 30, 2006 and incorporated therein by reference.
(6)
Filed as an exhibit to Amendment No. 2 to the Schedule 13D (the Registrant as issuer)
filed with the Commission on August 27, 2007 by Arsenal Holdco I, S.A.R.L., Arsenal Holdco
II, S.A.R.L., Francisco Partners GP II (Cayman), L.P., Francisco Partners GP II Management
(Cayman) Limited, Francisco Partners Gp II, L.P., Francisco Partners II (Cayman), L.P., and
Francisco Partners Parallel Fund II, L.P. and incorporated therein by reference.
(7)
Filed as an exhibit to Amendment No. 2 to the Schedule 13D (the Registrant as issuer)
filed with the Commission on September 28, 2007 by Terence H. Matthews, Wesley Clover
Corporation and Celtic Tech Jet Limited and incorporated therein by reference.
+
Portions of this document have been granted "Confidential Treatment" by the Secretary of the
Securities and Exchange Commission.
++
Portions of this document are subject to a pending Confidential Treatment Request filed with the
Secretary of the Securities and Exchange Commission and have been filed separately with the
Securities and Exchange Commission.