Exhibit 99.1

FOR RELEASE at 1:10 PM PST

BigBand Announces Fourth Quarter and Fiscal Year 2010 Results

REDWOOD CITY, Calif., February 1, 2011—BigBand Networks, Inc. (NASDAQ: BBND), a leader in digital video networking, today reported financial results for the fourth quarter and fiscal year ended December 31, 2010.

For the fourth quarter of 2010, total revenues were $26.3 million. This compares to revenues of $34.4 million reported in the fourth quarter of 2009. GAAP net loss for the fourth quarter of 2010 was $5.9 million, or ($0.09) per share, compared to GAAP net loss of $1.2 million, or ($0.02) per share, reported in the fourth quarter of 2009.

On a non-GAAP basis, the Company reported a net loss of $3.4 million, or ($0.05) per share, in the fourth quarter of 2010, which compares to non-GAAP net income of $3.1 million, or $0.04 per diluted share, reported in the fourth quarter of 2009. Fourth quarter 2010 non-GAAP results exclude $2.5 million in stock-based compensation expense and related income taxes.

For fiscal year 2010, total revenues were $111.7 million, compared to $139.5 million reported in 2009. GAAP net loss was $31.6 million, or ($0.46) per share, compared to GAAP net loss of $6.7 million, or ($0.10) per share, reported in fiscal year 2009.

On a non-GAAP basis, the Company reported a net loss of $17.5 million, or ($0.26) per share, for fiscal year 2010, which compares to non-GAAP net income of $9.3 million, or $0.13 per diluted share, reported for 2009. The GAAP to non-GAAP reconciling items, for the three months and years ended December 31, 2010 and 2009 can be found in “The Reconciliations of GAAP to Non-GAAP Financial Measures” attached to this press release.

BigBand closed fiscal year 2010 with $143.5 million in cash, cash equivalents and marketable securities.

“While our financial performance in fiscal year 2010 and our current outlook are disappointing, our recent progress with our customers and products is promising,” commented Amir Bassan-Eskenazi, President and CEO of BigBand Networks. “We are encouraged by our recent SDV win in Asia, we have received promising feedback on the MSP QAM and are experiencing growing interest in our vIP PASS and Advanced Advertising solutions. We

are optimistic that the strategy we are pursuing will allow for improved financial results in the second half of 2011.”

First Quarter 2011 Business Outlook

For the first quarter of 2011, management provides the following outlook:

	•		Net revenues are expected to be in the range of $17.0 million to $20.0 million
	•		GAAP gross margins are expected to be in the range of 49% to 52%
	•		Non-GAAP gross margins are expected to be in the range of 52% to 55%
	•		GAAP operating expenses are expected to be in the range of $21.5 million to $22.5 million
	•		Non-GAAP operating expenses are expected to be in the range of $17.0 million to $18.0 million
	•		GAAP net loss per share is expected to be in the range of ($0.17) to ($0.20)
	•		Non-GAAP net loss per share is expected to be in the range of ($0.09) to ($0.12)

The following table shows our non-GAAP outlook for the quarter ending March 31, 2011 reconciled to our GAAP outlook. Our non-GAAP outlook excludes stock-based compensation and restructuring charges.

		Estimated loss per
		Share
		Low				High
GAAP net loss			($0.17	)			($0.20	)
Stock-based compensation			0.05				0.05
Restructuring charges			0.03				0.03
Non-GAAP net loss			($0.09	)			($0.12	)

Non-GAAP Financial Measures

BigBand reports all financial information required in accordance with U.S. generally accepted accounting principles (GAAP), but we believe that evaluating our ongoing operating results may be difficult to understand if limited to reviewing only GAAP financial measures. Many of our investors have requested that we disclose non-GAAP information because it is useful in understanding our performance as it excludes non-cash and other one-time charges or benefits that many investors feel may obscure our true operating results. Likewise, management uses non-GAAP measures to manage and assess the profitability of our business going forward and does not consider stock-based compensation expense or restructuring charges in managing our operations and related taxes. Specifically, management does

not consider these expenses/benefits when developing and monitoring our budgets and spending. The economic substance behind our decision to exclude stock-based compensation is that this change is non-cash in nature. We exclude restructuring charges as they are one-time events. As a result, we use calculations of non-GAAP operating income, net loss, net loss per share and gross margin, which exclude these expenses when evaluating our ongoing operations and allocating resources within the organization.

As a result, our management believes it is useful, for itself and investors, to review both GAAP information that includes such charges and non-GAAP financial measures that exclude these charges because management believes such information enables readers of these financial results to have a better understanding of the overall performance of our ongoing business operations in the periods presented.

Whenever we use a non-GAAP financial measure, we provide a reconciliation of the non-GAAP financial measure to the most closely applicable GAAP financial measure. Investors are encouraged to review the related GAAP financial measures and the reconciliation of these non-GAAP financial measures to their most directly comparable GAAP financial measure.

Conference Call Details for February 1, 2011

BigBand Networks will host a corresponding conference call and live webcast at 2:00 p.m. Pacific Time today. To access the conference call, dial +1-877-941-2068 for the U.S. or Canada and +1-480-629-9712 for international callers. The webcast will be available live on the Investor Relations section of the Company’s corporate website at www.bigbandnet.com, and via replay beginning approximately two hours after the completion of the call until the Company’s announcement of its financial results for the next quarter. An audio replay of the call will also be available to investors beginning at approximately 4:00 p.m. Pacific Time on February 1, 2011 until 11:59 p.m. Pacific Time on February 8, 2011, by dialing +1-800-406-7325 or +1-303-590-3030 for callers outside the U.S. and Canada, and entering passcode 4401235#.

Cautionary Statement

The statements in this release regarding recent progress with customers being promising, being encouraged by our recent SDV win, promising feedback on our MSP QAM, growing interest in our viP PASS and Advanced Advertising solutions, being optimistic that our strategy will allow for improved financial results in the second half of 2011 and our GAAP and non-GAAP business outlook, as

applicable, with respect to the quarter ending March 31, 2011 (including revenues, gross margins, operating expenses and net loss per share) are forward-looking statements made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These statements involve risks and uncertainties that could cause our actual results to differ materially, including, but not limited to: unexpected fluctuations in our business due to adverse changes in the global economy, global credit issues, volatility in equity markets, changes in demand for video services, the market acceptance of our products; the financial strengths of our current and potential customers; the fluctuations in our gross margins; the concentration of our customer base; competitive developments including pricing pressures; the timing of recognition of a significant portion of our net revenues given the complex systems integration involved; our ability to manage operating expenses effectively; the level of orders that are received and can be shipped in a given quarter; and the general economic, industry or political conditions in the United States or internationally.

For a detailed discussion of these and other risk factors, please refer to BigBand’s Report on Form 10-K for fiscal year 2009 and most recent Report on Form 10-Q for the quarter ended September 30, 2010. You can obtain copies of the reports on the SEC’s Web site (www.sec.gov).

Stockholders of BigBand Networks are cautioned not to place undue reliance on our forward-looking statements, which speak only as of the date such statements are made. BigBand Networks does not undertake any obligation to publicly update any forward-looking statements to reflect events, circumstances or new information after this February 1, 2011 press release, or to reflect the occurrence of unanticipated events.

About BigBand Networks

BigBand Networks, Inc. [NASDAQ: BBND] provides broadband service providers with innovative digital video networking solutions designed to make it easier to move, manage and monetize video. These solutions are based on BigBand’s video-networking platforms that are built to enable efficient and reliable delivery across a wide range of services, including digital TV, high definition TV, advanced advertising, video-on-demand and interactive TV. BigBand Networks has done business with more than 200 customers in North America, Asia and Europe — including seven of the ten largest cable and telco service providers in North America. BigBand Networks is based in Redwood City, Calif., with offices worldwide. For additional information about the company, please call +1.650.995.5000, email info@bigbandnet.com or visit www.bigbandnet.com.

BigBand Networks’ brand and product names are service marks, trademarks or registered trademarks of BigBand Networks, Inc. in the United States and other countries. All other marks are the property of their respective owners.

Investor Relations:

Erica Abrams
+1.415.217.5864
erica@blueshirtgroup.com

Matthew Hunt
+1.415.489.2194
matt@blueshirtgroup.com

BigBand Networks, Inc.
Condensed Consolidated Balance Sheets
(In thousands, Unaudited)

		As of December 31,				As of December 31,
		2010				2009
ASSETS
Current assets:
Cash and cash equivalents		$	21,537			$	24,894
Marketable securities			122,012				147,014
Total cash, cash equivalents and marketable securities			143,549				171,908
Accounts receivable, net			5,001				18,495
Inventories, net			11,117				4,933
Prepaid expenses and other current assets			4,190				6,177
Total current assets			163,857				201,513
Property and equipment, net			8,088				11,417
Goodwill			1,656				1,656
Other non-current assets			7,170				9,002
Total assets		$	180,771			$	223,588
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable		$	4,656			$	9,483
Accrued compensation and related benefits			5,178				5,023
Current portion of deferred revenues, net			18,143				32,428
Current portion of other liabilities			4,266				7,083
Total current liabilities			32,243				54,017
Deferred revenues, net, less current portion			8,327				12,438
Other liabilities, less current portion			1,692				2,642
Accrued long-term Israeli severance pay			4,376				4,215
Stockholders’ equity:
Common stock			70				67
Additional paid-in-capital			299,003				283,704
Accumulated other comprehensive income			253				124
Accumulated deficit			(165,193	)			(133,619	)
Total stockholders’ equity			134,133				150,276
Total liabilities and stockholders’ equity		$	180,771			$	223,588

BigBand Networks, Inc.
Condensed Consolidated Statements of Operations
(In thousands, except per share amounts, Unaudited)

		Three Months Ended								Year Ended
		December 31,								December 31,
		2010				2009				2010				2009
Net revenues:
Products		$	15,859			$	24,867			$	73,606			$	93,662
Services			10,477				9,531				38,109				45,852
Total net revenues			26,336				34,398				111,715				139,514
Cost of net revenues:
Products			9,171				11,768				42,705				45,961
Services			2,669				3,215				11,850				12,384
Total cost of net revenues			11,840				14,983				54,555				58,345
Gross profit			14,496				19,415				57,160				81,169
Operating expenses:
Research and development			11,889				12,123				50,923				46,431
Sales and marketing			4,408				5,888				20,939				24,201
General and administrative			3,932				4,753				16,492				18,862
Restructuring charges			—				—				900				1,356
Class action litigation charges			—				—				—				477
Total operating expenses			20,229				22,764				89,254				91,327
Operating loss			(5,733	)			(3,349	)			(32,094	)			(10,158	)
Interest income			182				433				1,259				2,570
Other expense, net			(84	)			(156	)			(401	)			(218	)
Loss before provision for (benefit from) income taxes			(5,635	)			(3,072	)			(31,236	)			(7,806	)
Provision for (benefit from) income taxes			275				(1,834	)			338				(1,067	)
Net loss		$	(5,910	)		$	(1,238	)		$	(31,574	)		$	(6,739	)
Basic net loss per common share		$	(0.09	)		$	(0.02	)		$	(0.46	)		$	(0.10	)
Diluted net loss per common share		$	(0.09	)		$	(0.02	)		$	(0.46	)		$	(0.10	)
Shares used in GAAP basic net loss per common share			69,380				66,738				68,389				65,936
Shares used in GAAP diluted net loss per common share			69,380				66,738				68,389				65,936

BigBand Networks, Inc.
Reconciliation of GAAP to Non-GAAP Financial Measures
(In thousands, except per share amounts, Unaudited)

		Three Months Ended December 31, 2010
						Stock-based
						Compensation				Non-GAAP
		GAAP Results				and Income Taxes				Results
Net revenues:
Products		$	15,859			$	—			$	15,859
Services			10,477				—				10,477
Total net revenues			26,336				—				26,336
Cost of net revenues:
Products			9,171				(212	)			8,959
Services			2,669				(170	)			2,499
Total cost of net revenues			11,840				(382	)			11,458
Gross profit			14,496				382				14,878
Operating expenses:
Research and development			11,889				(945	)			10,944
Sales and marketing			4,408				(370	)			4,038
General and administrative			3,932				(665	)			3,267
Total operating expenses			20,229				(1,980	)			18,249
Operating loss			(5,733	)			2,362				(3,371	)
Interest income			182				—				182
Other expense			(84	)			—				(84	)
Loss before provision for income taxes			(5,635	)			2,362				(3,273	)
Provision for income taxes			275				(138	)			137
Net loss		$	(5,910	)		$	2,500			$	(3,410	)
Basic net loss per common share		$	(0.09	)						$	(0.05	)
Diluted net loss per common share		$	(0.09	)						$	(0.05	)
Shares used in basic net loss per common share			69,380								69,380
Shares used in diluted net loss per common share			69,380								69,380

BigBand Networks, Inc.
Reconciliation of GAAP to Non-GAAP Financial Measures
(In thousands, except per share amounts, Unaudited)

		Year Ended December 31, 2010
						Stock-based				Restructuring
		GAAP Results				Compensation				charges				Non-GAAP Results
Net revenues:
Products		$	73,606			$	—			$	—			$	73,606
Services			38,109				—				—				38,109
Total net revenues			111,715				—				—				111,715
Cost of net revenues:
Products			42,705				(1,227	)			—				41,478
Services			11,850				(877	)			—				10,973
Total cost of net revenues			54,555				(2,104	)			—				52,451
Gross profit			57,160				2,104				—				59,264
Operating expenses:
Research and development			50,923				(4,889	)			—				46,034
Sales and marketing			20,939				(2,105	)			—				18,834
General and administrative			16,492				(3,937	)			—				12,555
Restructuring charges			900				—				(900	)			—
Total operating expenses			89,254				(10,931	)			(900	)			77,423
Operating loss			(32,094	)			13,035				900				(18,159	)
Interest income			1,259				—				—				1,259
Other expense			(401	)			—				—				(401	)
Loss before provision for income taxes			(31,236	)			13,035				900				(17,301	)
Provision for income taxes			338				(97	)			—				241
Net loss		$	(31,574	)		$	13,132			$	900			$	(17,542	)
Basic net loss per common share		$	(0.46	)										$	(0.26	)
Diluted net loss per common share		$	(0.46	)										$	(0.26	)
Shares used in basic net loss per common share			68,389												68,389
Shares used in diluted net loss per common share			68,389												68,389

BigBand Networks, Inc.
Reconciliation of GAAP to Non-GAAP Financial Measures
(In thousands, except per share amounts and percentages, Unaudited)

		Three Months Ended								Year Ended
		December 31,								December 31,
		2010				2009				2010				2009
GAAP and Non-GAAP net revenues as reported		$	26,336			$	34,398			$	111,715			$	139,514
GAAP cost of net revenues as reported		$	11,840			$	14,983			$	54,555			$	58,345
Inventory recovery relating to CMTS platform			—				—				—				73
Stock-based compensation expense			(382	)			(563	)			(2,104	)			(2,084	)
Non-GAAP cost of net revenues		$	11,458			$	14,420			$	52,451			$	56,334
GAAP gross profit as reported		$	14,496			$	19,415			$	57,160			$	81,169
Inventory recovery relating to CMTS platform			—				—				—				(73	)
Stock-based compensation expense			382				563				2,104				2,084
Non-GAAP gross profit		$	14,878			$	19,978			$	59,264			$	83,180
As a percentage of net revenues:
GAAP gross profit as reported			55.0	%			56.4	%			51.2	%			58.2	%
Non-GAAP gross profit			56.5	%			58.1	%			53.0	%			59.6	%
GAAP operating loss as reported		$	(5,733	)		$	(3,349	)		$	(32,094	)		$	(10,158	)
Inventory recovery relating to CMTS platform			—				—				—				(73	)
Stock-based compensation expense:
- Cost of net revenues			382				563				2,104				2,084
- Research and development			945				1,321				4,889				4,887
- Sales and marketing			370				681				2,105				2,432
- General and administrative			665				1,356				3,937				4,816
Restructuring charges			—				—				900				1,356
Class action litigation charges			—				—				—				477
Non-GAAP operating (loss) income		$	(3,371	)		$	572			$	(18,159	)		$	5,821
GAAP net loss as reported		$	(5,910	)		$	(1,238	)		$	(31,574	)		$	(6,739	)
Inventory recovery relating to CMTS platform			—				—				—				(73	)
Stock-based compensation expense			2,362				3,921				13,035				14,219
Restructuring charges			—				—				900				1,356
Class action litigation charges			—				—				—				477
Tax benefits			138				377				97				25
Non-GAAP net (loss) income		$	(3,410	)		$	3,060			$	(17,542	)		$	9,265
Basic Non-GAAP net (loss) income per common share		$	(0.05	)		$	0.05			$	(0.26	)		$	0.14
Diluted Non-GAAP net (loss) income per common share		$	(0.05	)		$	0.04			$	(0.26	)		$	0.13
Shares used in Basic Non-GAAP net (loss) income per common share			69,380				66,738				68,389				65,936
Shares used in Diluted Non-GAAP net (loss) income per common share			69,380				69,027				68,389				68,727