Three Japanese Cable Operators Deploy BigBand Modular CMTS

Cable Networks Akita, Bay Communications and Hino Cable Television use BigBand Cuda® to deliver ultra high-speed data services; BigBand demonstrates IPTV over M-CMTS at Japan Cable TV & Telecommunications Show 2007

June 14, 2007

TOKYO, Japan Cable TV and Telecommunications Show, June 14, 2007— BigBand Networks, Inc. (NASDAQ: BBND) today announced that three Japanese cable operators are deploying modular cable modem termination system (M-CMTS) with BigBand’s Cuda® CMTS. Cable Networks Akita Co., Ltd., Hino Cable Television, Inc. and Bay Communications, Inc. are using BigBand’s M-CMTS solution to roll out high-speed data services that can achieve download speeds up to 120 megabits-per-second (Mbps) for some subscribers. BigBand also announced that—in conjunction with Japanese partner Nissho Electronics Corp.—it is demonstrating the ability of its M-CMTS solution to deliver IPTV in booth H26 at the Japan Cable TV & Telecommunications Show 2007 this weekend, June 14-16, in Tokyo.

“BigBand’s M-CMTS makes it relatively inexpensive for Japanese cable operators to roll out ambitious services—such as extremely high-speed Internet—to significantly enhance the subscriber experience,” said Koji Makino, executive officer of Nissho. “The ability to increase Internet speeds at a relatively low cost per bit, to support new applications such as video and gaming, is a significant competitive advantage for Japanese operators.”

Bay Communications and Cable Networks Akita have already begun rolling out high-speed data services to offer speeds up to 120 Mbps leveraging the Cuda-based M-CMTS with channel bonding. Hino Cable Television has upgraded its existing deployment of the Cuda 12000 to an M-CMTS architecture to expand the 25 Mbps downstream service to subscribers and roll out 120 Mbps downstream high-speed data service with channel bonding.

“Many Japanese consumers are early adopters when it comes to digital technology, and appreciate the multimedia applications enabled by extremely fast Internet speeds,“ said Rick Ford, vice president of the Asia Pacific region for BigBand. “BigBand’s M-CMTS is designed to allow Japanese operators to deliver the access speeds their subscribers want at a low cost relative to alternative solutions, without making existing modems and equipment obsolete.”

BigBand’s M-CMTS solution utilizes DOCSIS® 3.0 downstream channel bonding, a standards-based way to significantly increase the rate at which information travels to cable modems, and substantially lower the cost of providing higher-speed cable modem service. BigBand’s solution is designed to make it more profitable for operators to provide faster cable modem services at lower prices, and support IP video and other advanced, high-bandwidth applications. For additional information about BigBand’s M-CMTS, please visit http://www.bigbandnet.com/products/sol_mcmts.php.

About BigBand Networks

BigBand Networks, Inc. is a leading provider of broadband multimedia infrastructure for video, voice and data. The company's solutions are designed to process, optimize, and deliver services such as broadband Internet, VoIP, digital broadcast television, HDTV, transport of high quality video, local advertising, VOD, interactive TV and IPTV through any network. Service providers use BigBand Networks' platforms in efforts to cost-effectively expand revenue-generating offerings of rich content and advanced interactive services. Customers include cable operators, U.S. telecommunications companies, as well as leading service providers in Asia, Europe and Latin America. Founded in 1998, BigBand Networks is based in Redwood City, Calif., with offices worldwide. For more information, please call 650-995-5000, email info@bigbandnet.com or visit www.bigbandnet.com.

Cuda and all other BigBand Networks brand and product names are service marks, trademarks or registered trademarks of BigBand Networks, Inc. in the United States and other countries. DOCSIS is a trademark of Cable Television Laboratories, Inc. All other marks are the property of their respective owners.

This release contains "forward-looking statements" as defined under the U.S. Federal Securities Laws, including the Private Securities Litigation Reform Act of 1995 and is subject to the safe harbors created by such laws. Forward-looking statements may relate to, but are not limited to, the anticipated downloading speed using M-CMTS, the features available in, and the potential benefits to be derived from, BigBand Networks’ Cuda product and its M-CMTS solution, and market acceptance of such product or solution. Such forward-looking statements are based on current expectations that involve a number of uncertainties and risks that may cause actual events or results to differ materially. Factors that could cause actual events or results to differ materially include, among others, the following: rapid technological change that can adversely affect the demand for BigBand’s products, shifts in customer demand, shifts in strategic relationships, delays in BigBand’s ability to deliver its products and services, or announcements by competitors. These and other risks may be detailed from time to time in BigBand’s periodic reports filed with the Securities and Exchange Commission, copies of which may be obtained from www.sec.gov. BigBand Networks is under no obligation to (and expressly disclaims any such obligation to) update or alter its forward-looking statements whether as a result of new information, future events or otherwise. Information contained in our website is not incorporated by reference in, or made part of this press release.