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<P align="center" style="font-size: 14pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION<BR>
<FONT style="font-size: 12pt">Washington, D.C. 20549
</FONT></B>

<P align="center" style="font-size: 18pt"><B>FORM 8-K</B>

<P align="center" style="font-size: 12pt"><B>CURRENT REPORT<BR>
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934</B>

<P align="center" style="font-size: 10pt"><B>Date of Report (Date of earliest event reported): May 5, 2009</B>

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<P align="center" style="font-size: 24pt"><B>BigBand Networks, Inc.<BR></B>
<FONT style="font-size: 10pt">(Exact name of registrant as specified in its charter)
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    <TD style="border-bottom: 1px solid #000000"><B>Delaware</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-bottom: 1px solid #000000"><B>001-33355</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-bottom: 1px solid #000000"><B>04-3444278</B></TD>
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    <TD>(State or other Jurisdiction of Incorporation)</TD>
    <TD>&nbsp;</TD>
    <TD>(Commission File Number)</TD>
    <TD>&nbsp;</TD>
    <TD>(IRS Employer Identification No.)</TD>
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    <TD width="49%">&nbsp;</TD>
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    <TD style="border-bottom: 1px solid #000000"><B>475 Broadway Street<BR>Redwood City, California<BR></B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-bottom: 1px solid #000000"><B>94063</B></TD>
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<TR valign="top">
    <TD>(Address of Principal Executive Offices)</TD>
    <TD>&nbsp;</TD>
    <TD>(Zip Code)</TD>
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<P align="center" style="font-size: 10pt">Registrant&#146;s telephone number, including area code: <B>(650) 995-5000</B>


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    <TD nowrap>(Former name or former address if changed since last report.)</TD>
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<P align="left" style="font-size: 10pt">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:

<P align="left" style="font-size: 10pt">
<FONT face="Wingdings">&#111;</FONT> Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)<BR><BR>
<FONT face="Wingdings">&#111;</FONT> Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)<BR><BR>
<FONT face="Wingdings">&#111;</FONT> Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))<BR><BR>
<FONT face="Wingdings">&#111;</FONT> Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))<BR>


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<P align="center" style="font-size: 10pt; display: none">1
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<DIV align="left" style="font-size: 10pt; margin-top: 10pt"><B>Item&nbsp;2.02. Results of Operations and Financial Condition.</B>
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<DIV align="left" style="font-size: 10pt; margin-top: 10pt; text-indent: 4%">The information pursuant to Item&nbsp;2.02 in this report on Form 8-K is being furnished as
contemplated by General Instruction B(2) to Form 8-K and shall not be deemed &#147;filed&#148; for purposes
of Section&nbsp;18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the
liabilities of that Section.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 10pt; text-indent: 4%">On May&nbsp;5, 2009, we announced the results of our operations for the three months ended March&nbsp;31,
2009. The complete release is attached to this report as Exhibit&nbsp;99.1
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 10pt"><B>Item&nbsp;9.01. Financial Statements and Exhibits.</B>
</DIV>


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    <TD width="3%" nowrap align="left">(d)</TD>
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    <TD>Exhibits</TD>
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    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Press Release dated May&nbsp;5, 2009 of BigBand Networks, Inc.</TD>
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<DIV align="center" style="font-size: 10pt; margin-top: 10pt"><B>SIGNATURES</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 10pt; text-indent: 4%">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 hereunto duly authorized.
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    <TD colspan="3" align="left"><B>BIGBAND NETWORKS, INC.</B><BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">Date: May 5, 2009&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>

<TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/
Maurice L. Castonguay&nbsp;</TD>
    <TD>&nbsp;</TD>
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    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Maurice L. Castonguay&nbsp;</TD>
    <TD>&nbsp;</TD>
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    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap colspan="2" align="left">Senior Vice President &#038; Chief Financial Officer<BR>
(<I>Principal Accounting and Financial Officer</I>)&nbsp;</TD>
    <TD>&nbsp;</TD>
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    <TD colspan="5">&nbsp;</TD>
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<DIV align="center" style="font-size: 10pt; margin-top: 10pt"><B>EXHIBITS</B>
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    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Press Release dated May&nbsp;5, 2009 of BigBand Networks, Inc.</TD>
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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
Date of Report (Date of earliest event reported): May 5, 2009
BigBand Networks, Inc.
(Exact name of registrant as specified in its charter)
Delaware
001-33355
04-3444278
(State or other Jurisdiction of Incorporation)
(Commission File Number)
(IRS Employer Identification No.)
475 Broadway Street
Redwood City, California
94063
(Address of Principal Executive Offices)
(Zip Code)
Registrant's telephone number, including area code:
(650) 995-5000
(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:
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.
The information pursuant to Item 2.02 in this report on Form 8-K is being furnished as
contemplated by General Instruction B(2) to Form 8-K and shall not be deemed "filed" for purposes
of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the
liabilities of that Section.
On May 5, 2009, we announced the results of our operations for the three months ended March 31,
2009. The complete release is attached to this report as Exhibit 99.1
Item 9.01. Financial Statements and Exhibits.
(d)
Exhibits
99.1
Press Release dated May 5, 2009 of BigBand Networks, Inc.
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 hereunto duly authorized.
BIGBAND NETWORKS, INC.
Date: May 5, 2009
By:
/s/
Maurice L. Castonguay
Maurice L. Castonguay
Senior Vice President & Chief Financial Officer
(
Principal Accounting and Financial Officer
)
EXHIBITS
99.1
Press Release dated May 5, 2009 of BigBand Networks, Inc.