BigBand Networks to Deliver IP-Based HDTV, High-Definition VOD Over Existing Cable Modems at ANGA Cable 2007.

Multi-Vendor Demonstration Highlights Cost, Efficiency Advantages of BigBand's M-CMTS for IP Video Delivery

REDWOOD CITY, Calif. -- BigBand Networks, Inc., (NASDAQ:BBND), will demonstrate the ability of its modular cable modem termination system (M-CMTS) solution to deliver high-definition video-on-demand (VOD) and IPTV over existing DOCSIS([R])cable modems at Europe's largest cable conference next week. BigBand's exhibit--located in Stand D13 at ANGA Cable 2007 in Cologne, Germany--will highlight its M-CMTS solution's ability to increase broadband speeds to support high-definition, IP video at a fraction of the cost of alternative methods. Though cable IPTV is a relatively nascent technology, one operator is already using BigBand's Cuda CMTS--a key element of its M-CMTS solution--to deliver IP-based VOD to subscribers.

"Our M-CMTS solution provides extraordinary cost benefits by improving performance on existing infrastructure, and we're demonstrating that it is capable of delivering advanced IP video services," said John Holobinko, vice president and manager of cable IP for BigBand Networks. "There is simply no need for operators to embark on a proprietary approach to IP video; DOCSIS([R]) and M-CMTS provide an excellent, standards-based roadmap."

BigBand's exhibit includes two distinct demonstrations of its M-CMTS' video capabilities. The first is a multi-vendor demonstration that leverages a VOD server from BitBand, a Camiant policy server and application manager, a VOD session manager from eventIS and Zappware's set-top box middleware to deliver high-definition VOD over DOCSIS 2.0 modems. The second demonstration leverages BigBand's M-CMTS architecture with DOCSIS 3.0 channel bonding and a channel bonding cable modem to deliver both standard and high-definition video to an IPTV set-top box.

In addition to its technology demonstrations, BigBand will also present as part of a key technical session at the conference. In his presentation for the panel titled, "Getting the Most out of your HFC Network--Segmentation and Managing Impairments to Achieve Maximum Bandwidth," Hal Roberts, senior principal engineer for BigBand, will outline methods for improving the performance and reliability of upstream EuroDOCSIS[TM] networks. The panel is scheduled for Thursday, May 24 at 12:30 p.m.

For additional information about BigBand Networks' innovative M-CMTS solution, please visit http://www.bigbandnet.com/products/sol_mcmts.php. For additional information about BigBand's presence at ANGA or to arrange a demonstration, please email [e-mail].

About BigBand Networks

BigBand Networks, Inc., (NASDAQ:BBND), 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 across coaxial cable, fiber or copper. Service providers use BigBand Networks' platforms to cost-effectively expand revenue-generating offerings of rich content and advanced interactive services. Customers include six of the ten largest service providers in the U.S., and leading service providers in North America, 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 [e-mail] 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. DOCSIS and EuroDOCSIS are trademarks 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 features available in, and the potential benefits to be derived from, BigBand Networks' M-CMTS architecture. 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.