-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 GSCEi0nZ8v7BXwmlhuWANa1tKDuE48l1IeMaqfNWZ5pB8PG9dee/8QX5neW+Ybzc
 pZQJ+epPv7pUAm0m/U96aw==

<SEC-DOCUMENT>0001209191-03-026466.txt : 20031022
<SEC-HEADER>0001209191-03-026466.hdr.sgml : 20031022
<ACCEPTANCE-DATETIME>20031022200753
ACCESSION NUMBER:		0001209191-03-026466
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030506
FILED AS OF DATE:		20031022

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COSINE COMMUNICATIONS INC
		CENTRAL INDEX KEY:			0001060824
		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER COMMUNICATIONS EQUIPMENT [3576]
		IRS NUMBER:				943280301
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3200 BRIDGE PKWAY
		STREET 2:		STE 200
		CITY:			REDWOOD CITY
		STATE:			CA
		ZIP:			94065
		BUSINESS PHONE:		6506374777

	MAIL ADDRESS:	
		STREET 1:		3200 BRIDGE PARKWAY
		CITY:			REDWOOD CITY
		STATE:			CA
		ZIP:			94065

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CERF VINT
		CENTRAL INDEX KEY:			0001128886

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-30715
		FILM NUMBER:		03952893

	BUSINESS ADDRESS:	
		STREET 1:		40919 ENCYCLOPEDIA CIRCLE
		CITY:			FREMONT
		STATE:			CA
		ZIP:			94538
		BUSINESS PHONE:		5108974172

	MAIL ADDRESS:	
		STREET 1:		40919 ENCYCLOPEDIA CIRCLE
		CITY:			FREMONT
		STATE:			CA
		ZIP:			94538
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>bpa93838_bpa4vc.xml
<DESCRIPTION>MAIN DOCUMENT DESCRIPTION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4/A</documentType><periodOfReport>2003-05-06</periodOfReport><dateOfOriginalSubmission>2003-10-21</dateOfOriginalSubmission><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0001060824</issuerCik><issuerName>COSINE COMMUNICATIONS INC</issuerName>        <issuerTradingSymbol>COSN</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001128886</rptOwnerCik><rptOwnerName>CERF VINT</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>C/O COSINE COMMUNICATIONS, INC.</rptOwnerStreet1><rptOwnerStreet2>1200 BRIDGE PARKWAY</rptOwnerStreet2><rptOwnerCity>REDWOOD</rptOwnerCity><rptOwnerState>CA</rptOwnerState><rptOwnerZipCode>94065</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></repor
tingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><securityTitle><value>Employee Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>5.20</value></conversionOrExercisePrice><transactionDate><value>2003-05-06</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>2000</value></transactionShares><transactionPricePerShare><value>5.20</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><footnoteId id="F1" /></exerciseDate><expirationDate><value>2013-05-06</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>2000</value></underlyingSecurityShares></underlyingSecurity><postTransact
ionAmounts><sharesOwnedFollowingTransaction><value>2000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Employee Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>6.96</value></conversionOrExercisePrice><transactionDate><value>2003-10-20</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>6000</value></transactionShares><transactionPricePerShare><value>6.96</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><footnoteId id="F2" /></exerciseDate><expirationDate><value>2013-10-20</value></expirationDate><underly
ingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>6000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>6000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">Option granted pursuant to the CoSine Communications, Inc. 2002 Director Option Plan. Such option vests and becomes exercisable on the 4th one-year anniversary of the date of grant</footnote><footnote id="F2">Option granted pursuant to the CoSine Communications, Inc. 2000 Stock Option Plan. Such option will vest and become exercisable over four years with 25% of the option shares vesting on the one-year anniversary of the date of grant, October 20, 2004, and 1/48th of the option shares vesting on each one-month anniversary
 thereafter.</footnote></footnotes><ownerSignature><signatureName>/s/ Marc Bocci for Vinton Cerf</signatureName><signatureDate>2003-10-22</signatureDate></ownerSignature></ownershipDocument>

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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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