<SEC-DOCUMENT>0001144204-15-053988-index.html : 20150908
<SEC-HEADER>0001144204-15-053988.hdr.sgml : 20150907
<ACCEPTANCE-DATETIME>20150908141325
ACCESSION NUMBER:		0001144204-15-053988
CONFORMED SUBMISSION TYPE:	SC 13D
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20150908
DATE AS OF CHANGE:		20150908

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SYCAMORE NETWORKS INC
		CENTRAL INDEX KEY:			0001092367
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE & TELEGRAPH APPARATUS [3661]
		IRS NUMBER:				043410558
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0731

	FILING VALUES:
		FORM TYPE:		SC 13D
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-58421
		FILM NUMBER:		151096241

	BUSINESS ADDRESS:	
		STREET 1:		220 MILL ROAD
		CITY:			CHELMSFORD
		STATE:			MA
		ZIP:			01824
		BUSINESS PHONE:		9782502900

	MAIL ADDRESS:	
		STREET 1:		220 MILL ROAD
		CITY:			CHELMSFORD
		STATE:			MA
		ZIP:			01824

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MILLER LLOYD I III
		CENTRAL INDEX KEY:			0000949119

	FILING VALUES:
		FORM TYPE:		SC 13D
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D
<SEQUENCE>1
<FILENAME>v419900_sc13d.htm
<DESCRIPTION>SC 13D
<TEXT>
Document 1 - file: v419900_sc13d.htm

</DOCUMENT>
</SEC-DOCUMENT>