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     <!-- Project:        I:\CONVER\ny14671.eep                                            -->
     <!-- Control Number: NY14671                                                          -->
     <!-- Rev Number:     Guy Chayoun                                                          -->
     <!-- Client Name:    Sycamore Networks Inc                                            -->
     <!-- Project Name:   NY14671 - 8-K                                                    -->
     <TITLE>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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<TD><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>June 16, 2005<br>Date
of Report (Date of earliest event reported)</FONT></TD></TR>
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     <TD WIDTH="600" ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif" SIZE="2"><B><!-- Name of Registrant -->SYCAMORE NETWORKS, INC.</B></FONT></TD></TR>
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     <TD WIDTH="600" 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 WIDTH="33%" ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif" SIZE=2><!-- State-->Delaware</FONT></TD>
<TD WIDTH="34%" ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif" SIZE=2><!-- File No.-->000-27273</FONT></TD>
<TD WIDTH="33%" ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif" SIZE=2><!-- Irs No.-->04-3410558</FONT></TD>
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<TD WIDTH="33%"ALIGN="CENTER"><HR SIZE="1" WIDTH="90%"></TD>
<td WIDTH="34%"ALIGN="CENTER"><HR SIZE="1" WIDTH="85%"></TD>
<TD WIDTH="33%"ALIGN="CENTER"><HR SIZE="1" WIDTH="85%"></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<BR>File Number) </FONT></TD>
<TD ALIGN="CENTER"><Font Face="Times New Roman, Times, Serif" Size=2>(IRS Employer<BR> Identification No.) </FONT></TD>
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<TD ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>220
Mill Road <BR>Chelmsford, MA 01824<BR>(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;&nbsp;(978) 250-2900 </FONT></TD></TR>
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<TD ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Not
Applicable<BR>(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></TABLE><BR>

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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=4%><font face="wingdings"> &#168; </font></TD>
<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=96%><FONT FACE="Times New Roman, Times, Serif" SIZE=2>
 Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (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 (17 CFR
240.13e-4(c)) </FONT></TD>
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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2><B>Item 3.01: Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard;
Transfer of Listing.</B> </FONT></TD></TR></TABLE><BR>


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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
June 16, 2005, we received a letter from the Staff of The Nasdaq Stock Market
(&#147;Nasdaq&#148;) indicating that as a result of our failure to file with the
Securities and Exchange Commission our Quarterly Report on Form 10-Q for the fiscal
quarter ended April 30, 2005, we are not in compliance with Nasdaq requirements for
continued listing set forth in Nasdaq Marketplace Rule 4310(c)(14). Nasdaq Marketplace
Rule 4310(c)(14) requires us to make on a timely basis all filings with the
Securities and Exchange Commission, as required by the Securities Exchange Act of 1934, as
amended. Nasdaq rules permit us to request a hearing with a Nasdaq Listing Qualifications
Panel to appeal the Staff&#146;s determination to delist our common stock. We intend to
make such an appeal.  Until the Panel issues a determination and the expiration of any exception granted by the Panel, our common
stock will continue to be traded on The Nasdaq National Market.</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;
While we are working diligently to finalize our previously announced internal investigation and complete our
Form 10-Q, there can be no assurance that the Panel will grant our request for an exception that would allow
the continued listing of our common stock on Nasdaq until we file our Form 10-Q for the
quarter ended April 30, 2005 with the Securities and Exchange Commission. </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;On
June 17, 2005, we issued a press release, attached to this Current Report on Form 8-K as
Exhibit 99.1, reporting that we received the letter from Nasdaq described in this Current
Report on Form 8-K. </FONT></TD></TR>
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<TD><FONT FACE="Times New Roman, Times, Serif" SIZE=2><B>Item 9.01: &nbsp;Financial Statements and Exhibits.</B><BR><BR>
(c) &nbsp;&nbsp;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%><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  </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 June 17, 2005. </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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<P ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Sycamore Networks, Inc. </FONT></P></TD></TR>
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<P ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=2><U>/s/ Daniel E. Smith&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U><BR>
Daniel E. Smith<BR>
President and Chief Executive Officer<BR>
(Duly Authorized Officer) </FONT></P></TD></TR>
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<P ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Dated: &nbsp;June 17, 2005 </FONT></P></TD></TR>
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<P ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=2>EXHIBIT INDEX </FONT></P></TD></TR>
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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%><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  </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 June 17, 2005. </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": "05901487"}, "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"}}
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
June 16, 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 3.01: Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard;
Transfer of Listing.
On
June 16, 2005, we received a letter from the Staff of The Nasdaq Stock Market
("Nasdaq") indicating that as a result of our failure to file with the
Securities and Exchange Commission our Quarterly Report on Form 10-Q for the fiscal
quarter ended April 30, 2005, we are not in compliance with Nasdaq requirements for
continued listing set forth in Nasdaq Marketplace Rule 4310(c)(14). Nasdaq Marketplace
Rule 4310(c)(14) requires us to make on a timely basis all filings with the
Securities and Exchange Commission, as required by the Securities Exchange Act of 1934, as
amended. Nasdaq rules permit us to request a hearing with a Nasdaq Listing Qualifications
Panel to appeal the Staff's determination to delist our common stock. We intend to
make such an appeal.  Until the Panel issues a determination and the expiration of any exception granted by the Panel, our common
stock will continue to be traded on The Nasdaq National Market.
While we are working diligently to finalize our previously announced internal investigation and complete our
Form 10-Q, there can be no assurance that the Panel will grant our request for an exception that would allow
the continued listing of our common stock on Nasdaq until we file our Form 10-Q for the
quarter ended April 30, 2005 with the Securities and Exchange Commission.
On
June 17, 2005, we issued a press release, attached to this Current Report on Form 8-K as
Exhibit 99.1, reporting that we received the letter from Nasdaq described in this Current
Report on Form 8-K.
Item 9.01:  Financial Statements and Exhibits.
(c)   Exhibits
Exhibit
Number
Description
99.1
Press
Release of the Registrant, dated June 17, 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/ Daniel E. Smith
Daniel E. Smith
President and Chief Executive Officer
(Duly Authorized Officer)
Dated:  June 17, 2005
EXHIBIT INDEX
Exhibit
Number
Description
99.1
Press Release of the Registrant, dated June 17, 2005.