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     <!-- Project Number: NY14836                                 -->
     <!-- Attorney:       Caroline Brenner                        -->
     <!-- Filer Name:     Sycamore Networks Inc.                  -->
     <!-- Filing Type:    8-K                                     -->
     <TITLE>Form 8-K</TITLE>
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<TD><H1 ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION <BR>
WASHINGTON, D.C. 20549 </FONT></H1></TD></TR>
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<H1 ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>FORM 8-K  </FONT></H1></TD></TR>
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<TD ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>CURRENT
REPORT<BR>Pursuant to Section 13 or 15(d) of the<BR> Securities Exchange Act of 1934  </FONT></TD></TR>
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<TD ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>August 2, 2005<!-- DATE --> <BR>Date of Report (Date of earliest event reported)</FONT></TD></TR>
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<TD ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2><B>SYCAMORE NETWORKS, INC.</B> </FONT> </TD></TR>
 <TR VALIGN=TOP>
<TD ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>(Exact name of registrant as specified in its charter) </FONT></TD></TR>
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<TD ALIGN=CENTER WIDTH=33%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Delaware<!-- STATE--> </FONT></TD>
<TD ALIGN=CENTER WIDTH=34%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>000-27273<!-- FILE NO.--> </FONT></TD>
<TD ALIGN=CENTER WIDTH=33%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>04-3410558<!-- IRS NO.--> </FONT></TD>
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<TD ALIGN=CENTER><HR SIZE=1 NOSHADE WIDTH=90%></TD>
<TD ALIGN=CENTER><HR SIZE=1 NOSHADE WIDTH=90%></TD>
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<TD ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>(State or Other Jurisdiction<BR>of Incorporation)
</FONT></TD>
<TD ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>(Commission File Number) </FONT></TD>
<TD ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>(IRS Employer Identification No.) </FONT></TD>
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    220 Mill Road    <BR>
Chelmsford, MA 01824
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(Address of principal executive offices)<BR>
(Zip code) </FONT></TD></TR>
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<TD ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Registrant's
telephone number, including area code: &nbsp; (978) 250-2900 </FONT></TD></TR>
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     <TD WIDTH="600" ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif" SIZE="2">Not Applicable<!-- FORMER NAME OR ADDRESS --></FONT></TD></TR>
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     <TD WIDTH="600" ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif" SIZE="2">
(Former name or former address, if changed since last report) </FONT></TD></TR>
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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Check
the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy
the filing obligation of the registrant under any of the following provisions:  </FONT></TD></TR>
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<TD WIDTH=4%><font face="wingdings"> &#168; </font></TD>
<TD WIDTH=96%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>
 Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) </FONT></TD>
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<TD WIDTH=96%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>
 Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) </FONT></TD>
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<TD WIDTH=4%><font face="wingdings"> &#168; </font></TD>
<TD WIDTH=96%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>
 Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act <BR>(17 CFR
240.14d-2(b)) </FONT></TD>
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<TD WIDTH=96%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>
 Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act <BR>(17 CFR
240.13e-4(c)) </FONT></TD>
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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2><b>Item 2.02: Results of Operations and Financial Condition.</b> </FONT></TD></TR></TABLE>
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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; On
August 1, 2005, the  Registrant reported preliminary revenue and an
aggregate cash, cash equivalents and investments amount for the quarter and
nine months ended April 30, 2005.  A copy of the press release issued by the Registrant on August 1, 2005 concerning the foregoing results is
furnished herewith as Exhibit 99.1 and is incorporated herein by reference.</FONT></TD></TR>
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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
The information contained herein Item 2.02 and in the accompanying exhibit shall not be incorporated by
reference into any filing of the Registrant, whether made before or after the date hereof, regardless of any
general incorporation language in such filing, unless expressly incorporated by specific reference into such
filing. The information in this Item 2.02, including the exhibit hereto, shall not be deemed to be "filed"
for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the
liabilities of that section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended.</FONT></TD></TR>
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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2><b>Item 8.01: Other Events.</b> </FONT></TD></TR></TABLE>
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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In
addition to the financial results referred to in Item 2.02 above, the press
release issued by the Registrant on August 1, 2005 reported that the Registrant's previously announced internal investigation conducted under the
direction of the Audit Committee of the board of directors and the review of
the resulting accounting implications, if any, is nearing completion.  The
Registrant also announced that while there can be no assurance as to the final
results, it expects the outcome of the investigation will not result in any
material adjustment being required to be made to the Registrant's  historical
revenues, non-stock option related expenses or cash positions. The Registrant further reported that it is currently unable
to estimate when it will be able to file its Form 10-Q for the period ended
April 30, 2005, but that it intends to do so as soon as practicable.
The press release announcing the aforementioned matters is attached as
Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference  herein.</FONT></TD></TR>
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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2><B>Item
9.01: Financial Statements and Exhibits.</B> </FONT></TD></TR></TABLE><BR>

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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2>(c) Exhibits  </FONT></TD></TR></TABLE><BR>



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<TD WIDTH=13%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Exhibit<BR><U>Number</U></FONT></TD>
<TD WIDTH=3%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="84%" VALIGN="BOTTOM"><FONT FACE="Times New Roman, Times, Serif" SIZE=2><U>Description</U></FONT></TD>
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<TD WIDTH=13%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>99.1<!-- EXHIBIT No. -->  </FONT></TD>
<TD WIDTH=3%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH=84%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Press Release of the Registrant, dated August 1, 2005.<!-- Description Detail --> </FONT></TD>
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<TD><H1 ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>SIGNATURES </FONT></H1></TD></TR>
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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Pursuant
to the requirements of the Securities Exchange Act of 1934, the Registrant has duly
caused this report to be signed on its behalf by the undersigned thereunto duly
authorized.  </FONT></TD></TR></TABLE><BR>





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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Sycamore Networks, Inc. </FONT></TD></TR></TABLE>
<BR><BR>

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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2><!-- /s/ NAME -->/s/ Richard J. Gaynor  </FONT></TD></TR></TABLE>
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<TD><HR WIDTH="250" SIZE="1" ALIGN="Left">  </TD></TR></TABLE>

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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Richard J. Gaynor<BR> Chief Financial Officer<BR>
 (Duly Authorized Officer and Principal<BR> Financial and
Accounting Officer) </FONT></TD></TR></TABLE><BR>
<BR>



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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Dated: August 2, 2005 </FONT></TD></TR></TABLE><BR>

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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=3>EXHIBIT INDEX  </FONT></TD></TR></TABLE><BR>




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<TD WIDTH=13%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Exhibit<BR><U>Number</U></FONT></TD>
<TD WIDTH=3%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="84%" VALIGN="BOTTOM"><FONT FACE="Times New Roman, Times, Serif" SIZE=2><U>Description</U></FONT></TD>
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<TD WIDTH=13%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>99.1<!-- EXHIBIT No. -->  </FONT></TD>
<TD WIDTH=3%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH=84%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Press Release of the Registrant, dated August 1, 2005.<!-- Description Detail --> </FONT></TD>
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{"company-data": {"conformed-name": "SYCAMORE NETWORKS INC", "cik": "0001092367", "assigned-sic": "3661", "irs-number": "043410558", "state-of-incorporation": "DE", "fiscal-year-end": "0731"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-27273", "film-number": "05990884"}, "business-address": {"street1": "220 MILL ROAD", "city": "CHELMSFORD", "state": "MA", "zip": "01824", "phone": "9782502900"}, "mail-address": {"street1": "220 MILL ROAD", "city": "CHELMSFORD", "state": "MA", "zip": "01824"}}
Form 8-K
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 8-K
CURRENT
REPORT
Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934
August 2, 2005
Date of Report (Date of earliest event reported)
SYCAMORE NETWORKS, INC.
(Exact name of registrant as specified in its charter)
Delaware
000-27273
04-3410558
(State or Other Jurisdiction
of Incorporation)
(Commission File Number)
(IRS Employer Identification No.)
220 Mill Road
Chelmsford, MA 01824
(Address of principal executive offices)
(Zip code)
Registrant's
telephone number, including area code:   (978) 250-2900
Not Applicable
(Former name or former address, if changed since last report)
Check
the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy
the filing obligation of the registrant under any of the following provisions:
¨
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
¨
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
¨
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act
(17 CFR
240.14d-2(b))
¨
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act
(17 CFR
240.13e-4(c))
Item 2.02: Results of Operations and Financial Condition.
On
August 1, 2005, the  Registrant reported preliminary revenue and an
aggregate cash, cash equivalents and investments amount for the quarter and
nine months ended April 30, 2005.  A copy of the press release issued by the Registrant on August 1, 2005 concerning the foregoing results is
furnished herewith as Exhibit 99.1 and is incorporated herein by reference.
The information contained herein Item 2.02 and in the accompanying exhibit shall not be incorporated by
reference into any filing of the Registrant, whether made before or after the date hereof, regardless of any
general incorporation language in such filing, unless expressly incorporated by specific reference into such
filing. The information in this Item 2.02, including the exhibit hereto, shall not be deemed to be "filed"
for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the
liabilities of that section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended.
Item 8.01: Other Events.
In
addition to the financial results referred to in Item 2.02 above, the press
release issued by the Registrant on August 1, 2005 reported that the Registrant's previously announced internal investigation conducted under the
direction of the Audit Committee of the board of directors and the review of
the resulting accounting implications, if any, is nearing completion.  The
Registrant also announced that while there can be no assurance as to the final
results, it expects the outcome of the investigation will not result in any
material adjustment being required to be made to the Registrant's  historical
revenues, non-stock option related expenses or cash positions. The Registrant further reported that it is currently unable
to estimate when it will be able to file its Form 10-Q for the period ended
April 30, 2005, but that it intends to do so as soon as practicable.
The press release announcing the aforementioned matters is attached as
Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference  herein.
Item
9.01: Financial Statements and Exhibits.
(c) Exhibits
Exhibit
Number
Description
99.1
Press Release of the Registrant, dated August 1, 2005.
SIGNATURES
Pursuant
to the requirements of the Securities Exchange Act of 1934, the Registrant has duly
caused this report to be signed on its behalf by the undersigned thereunto duly
authorized.
Sycamore Networks, Inc.
/s/ Richard J. Gaynor
Richard J. Gaynor
Chief Financial Officer
(Duly Authorized Officer and Principal
Financial and
Accounting Officer)
Dated: August 2, 2005
EXHIBIT INDEX
Exhibit
Number
Description
99.1
Press Release of the Registrant, dated August 1, 2005.