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        D.C. 20549 </strong></font></div>
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        8-K </strong></font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>CURRENT
        REPORT</strong></font></div>
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        to Section 13 or 15(d) of</strong></font></div>
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        Securities Exchange Act of 1934</strong></font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Date
        of Report (date of earliest event reported):&#160;&#160;August 1, 2005
        </strong></font></div>
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        name of Registrant as specified in its charter) </font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Former
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                  report.)</font></div>
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        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 (see General Instruction A.2. below):</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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        Written communications
        pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</font></div>
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        Soliciting material pursuant to Rule
        14a-12 under the Exchange Act (17 CFR 240.14a-12)</font></div>
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        Pre-commencement communications pursuant
        to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</font></div>
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        Pre-commencement communications pursuant
        to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</font></div>
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        Results of Operations and Financial Condition.</strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On
        August
        1, 2005, CoSine Communications, Inc. issued a press release announcing its
        financial results for its second quarter ended June 30, 2005. The full text
        of
        the press release is attached hereto as Exhibit&#160;99.1 to this Current
        Report. </font></div>
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        Financial Statements and Exhibits.</strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></a></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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              </td>
              <td align="left" style="WIDTH: 18pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(c)</font></td>
              <td align="left">
                <div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Exhibits.
                  </font></div>
              </td>
            </tr>

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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
          <div>
            <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%" style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">

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                  <td style="WIDTH: 72pt">
                  </td>
                  <td align="left" style="WIDTH: 27pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">99.1</font></td>
                  <td align="left">
                    <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Press
                      Release, dated August 1, 2005, of CoSine Communications,
                      Inc.</font></div>
                  </td>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>SIGNATURES</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pursuant
        to the requirements of the Securities Exchange Act of 1934, as amended, the
        registrant has duly caused this report to be signed on its behalf by the
        undersigned, thereunto duly authorized. </font><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">August
                  1, 2005</font></div>
              </td>
              <td align="left" valign="top" width="5%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">By:</font></div>
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              <td align="left" valign="top" width="40%" style="BORDER-BOTTOM: black thin solid">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">/s/
                  Terry Gibson</font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="46%">&#160;</td>
              <td align="left" valign="top" width="5%">&#160;</td>
              <td valign="top" width="40%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Terry
                  Gibson,</font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="46%">&#160;</td>
              <td align="left" valign="top" width="5%">&#160;</td>
              <td valign="top" width="40%">
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                  Executive Officer, Chief Financial Officer and Secretary (Principal
                  Executive, Financial and Accounting Officer and Duly Authorized
                  Officer)</font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>INDEX
        TO EXHIBITS</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
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                  Release, dated August 1, 2005, of CoSine Communications,
                  Inc.</font></div>
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{"company-data": {"conformed-name": "COSINE COMMUNICATIONS INC", "cik": "0001060824", "assigned-sic": "3576", "irs-number": "943280301", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-30715", "film-number": "05989149"}, "business-address": {"street1": "1200 BRIDGE PKWAY", "street2": "STE 200", "city": "REDWOOD CITY", "state": "CA", "zip": "94065", "phone": "6506374777"}, "mail-address": {"street1": "1200 BRIDGE PARKWAY", "city": "REDWOOD CITY", "state": "CA", "zip": "94065"}}
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
Date
        of Report (date of earliest event reported):  August 1, 2005
COSINE
        COMMUNICATIONS, INC.
(Exact
        name of Registrant as specified in its charter)
Delaware
000-30715
94-3280301
(State
                  or other jurisdiction of
incorporation
                  or organization)
(Commission
File
                  Number)
(I.R.S.
                  Employer
Identification
                  Number)
560
                  S. Winchester Blvd., Suite 500
San
                  Jose, California 95128
(Address
                  of principal executive offices) (Zip Code)
(408) 236-7518
(Registrant's
                  telephone number, including area
                  code)
(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 (see General Instruction A.2. below):
o
Written communications
        pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
o
Soliciting material pursuant to Rule
        14a-12 under the Exchange Act (17 CFR 240.14a-12)
o
Pre-commencement communications pursuant
        to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
o
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, CoSine Communications, Inc. issued a press release announcing its
        financial results for its second quarter ended June 30, 2005. The full text
        of
        the press release is attached hereto as Exhibit 99.1 to this Current
        Report.
Item 9.01
        Financial Statements and Exhibits.
(c)
Exhibits.
99.1
Press
                      Release, dated August 1, 2005, of CoSine Communications,
                      Inc.
SIGNATURES
Pursuant
        to the requirements of the Securities Exchange Act of 1934, as amended, the
        registrant has duly caused this report to be signed on its behalf by the
        undersigned, thereunto duly authorized.
August
                  1, 2005
By:
/s/
                  Terry Gibson
Terry
                  Gibson,
Chief
                  Executive Officer, Chief Financial Officer and Secretary (Principal
                  Executive, Financial and Accounting Officer and Duly Authorized
                  Officer)
INDEX
        TO EXHIBITS
Exhibit
No.
Description
99.1
Press
                  Release, dated August 1, 2005, of CoSine Communications,
                  Inc.