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 and amortization of intangible assets which are non-cash charges. Additionally, management does not consider restructuring charges, any benefit from the sale of the CMTS product inventory that was previously reserved for in prior periods and related taxes and class action litigation charges in managing our operations. 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 and amortization of intangible assets relates to these charges being non-cash in nature. We exclude restructuring and class action litigation charges as they are one-time events. As a result, we use calculations of non-GAAP operating income, net income, net income 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 such parties 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 August 4, 2009

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 August 4, 2009 until 11:59 p.m. Pacific Time on August 12, 2009, by dialing +1-800-406-7325 or +1-303-590-3030 for callers outside the U.S. and Canada, and entering passcode 4117502#.

Cautionary Statement

The statements in this release regarding slower order rates expected to impact revenue into the second half of 2009, our order rates improving, winning new systems and establishing new product applications that we believe will improve our position as industry spending normalizes, being optimistic about our long-term opportunity in the digital video networking market and our GAAP and non-GAAP business outlook, as applicable, with respect to the quarter ending September 30, 2009 (including revenues, gross margins, operating expenses, taxes and earnings 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 the continuing recession in the global economy, global credit issues, changes in demand for video services, the market acceptance of our products; the financial strength 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 most recent Form 10-Q for the quarter ended March 31, 2009 and Form 10-K for fiscal year 2008. You can obtain copies of these 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 August 4, 2009 press release, or to reflect the occurrence of unanticipated events.

About BigBand Networks

BigBand Networks, Inc. (NASDAQ: BBND) provides broadband service providers with innovative network 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' customers include more than 200 service providers -- including seven of the ten largest service providers in the U.S. -- and leading cable and telco service providers in North America, Asia, Europe and Latin 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.