Adaptive Broadband and Jetstream Equipment Enable Cybertech Wireless' Deployment of a Carrier Class Multipoint Fixed Wireless Broadband Network.

Business Editors and Technology Writers

SUNNYVALE, Calif.--(BUSINESS WIRE)--Aug. 29, 2000

First to Provision Voice over ATM using AB-Access(TM) Data Networking

Equipment, Bypasses Telephone Companies' Local Loops Completely

Adaptive Broadband(tm) Corporation (Nasdaq/NM:ADAP) announced today the deployment of a Carrier Class Multipoint Fixed Wireless Network for Cybertech Wireless Inc. that delivers multi-line local and long distance telephone service together with streaming video and high-speed data.

The network uses Adaptive Broadband's AB-Access platform to provide customers bandwidth of up to 25 Mbps and uses Jetstream's Carrier Class CPX-1000 broadband service delivery platform to provide toll quality voice. Serving corporations and small businesses, the network is currently operating in Rochester, NY.

Delivery of Voice, Video and Data Not Dependent on Local Phone Company

In April 2000, Cybertech Wireless contracted with Adaptive Broadband to provide AB-Access to its business-to-business customers, citing the competitive edge AB-Access afforded the Internet Service Provider by allowing it to control the bandwidth by bypassing the local telephone carrier, with its attendant access charges. "The demand for our bundled voice and data services has been tremendous, especially with regards to our ability to turn up service quickly. We are turning up circuits in a matter of days vs. the 120-day quotes our customers have been receiving from the incumbent operator," said William D. Palma, president of Cybertech Wireless Inc.

The AB-Access fixed wireless broadband platform bridges the last mile, replacing the local loop for corporate and small business subscribers. Combining a leading packet-on-demand technology and time division duplexing, it offers data transmission at rates up to 25 Mbps -- providing the capability for voice, real-time video conferencing, transmission of full streaming video, web surfing, and transmission of data files -- all simultaneously and over one connection. "This is a significant step towards proving that Internet Protocol (IP) technology can be carrier class and not just used for best-effort data services," commented John Skoro, Adaptive Broadband's senior vice president of sales and market development. "We've always said that leveraging the cost economies of IP to perform both voice and data services is going to be the leg-up that operators like Cybertech will need to compete effectively. Today, that leg up has materialized," continued Skoro.

Voice Services Platform Certified Interoperable with all Major Class 5 Switches

The Jetstream CPX-1000 is a large-scale voice services platform that lets carriers deliver multi-line local telephone service over Wireless Local Loop (WLL) broadband access networks. Certified interoperable with all major Class 5 switches including the Lucent 5ESS, Nortel Networks DMS-100 and DMS-500 and Siemens EWSD, the CPX-1000 connects to the switch via industry-standard GR-303 interfaces, assuring complete feature and operational transparency. The network has passed Telecordia Technologies standards that qualify it for toll quality voice. IEEE and TR57 tests show the quality of wireless communications is equal to if not better then that of a normal copper wire line currently offered by Incumbent Local Exchange Carriers (ILECs).

Delivers True Circuit-switched-quality Telephone Service Over Broadband

Local telephone service through the CPX-1000 is comparable in quality and features to conventional wireline service. Subscribers do not discern a difference in voice quality and can continue to receive the reliability and calling features they have come to expect. They can also continue to use all their existing telephone equipment, including key telephone systems, fax machines, analog telephones and modems. A CPX-1000 can support as few as 200 subscriber telephone lines for cost-effective market entry, and efficiently scale to support hundreds of thousands of phone lines.

About Adaptive Broadband

Adaptive Broadband (www.adaptivebroadband.com) is a data networking solutions company that is developing leading-edge technology for the deployment of broadband wireless communication over the Internet. Its AB-Access platform is a leading commercial choice for fixed broadband wireless communication. AB-Access technology spans the frequency range from 2 to 42 GHz. While the first releases for AB-Access are for applications using the 5 GHz U-NII (Unlicensed National Information Infrastructure), 2.5 GHz MMDS (Multi-channel, Multipoint Distribution Service) and 3.5 GHz (International WLL) products are also available. Additionally, Adaptive Broadband recently announced an LMDS (Local Multipoint Distribution Service) version of AB-Access. Product bandwidth is planned to expand to 100 Mbps in 2000. Currently positioned as a fixed offering, portable versions of AB-Access are planned in 2000. The Carrier Class Network deployed by Cybertech Wireless operates in the U-NII band.

About Jetstream Communications

Jetstream Communications Inc. is a leading provider of Voice over Broadband (VoBB) equipment to incumbent and competitive local exchange carriers. The company's patented JetPowered(tm) Voice over Broadband solution is rapidly becoming a standard for bundled voice and data service delivery over DSL, T1 and wireless broadband access networks. Based in San Jose, California, Jetstream is a privately held, venture-backed company led by a seasoned management team consisting of veterans from both the telecommunications and data communications industries. The company was recently named one of Upside Magazine's Hot 100 Private Companies. For more information, see the company web site at www.jetstream.com.

About Cybertech Wireless Inc.

New York-based Cybertech Wireless Inc. (CWI) is a privately held, full-service, business-to-business Internet Service Provider serving customers throughout Upstate New York. Founded in 1994 as a computer bulletin board service (BBS), Cybertech Systems provided communications between customers and the Internet. In 1999, the company founded Cybertech Wireless, Inc., constructing a high-speed wireless network that provides communications services to Rochester, Syracuse, Buffalo and Albany, NY. Working with technology partners such as Cabletron Systems, Verio and Ronco Communications and Electronics, Inc., CWI provides network communications services from 128 Kpbs up to 100 Mbps, and are expanding their services to 30 other cities in the United States. Additionally, Cybertech is providing wireless broadband service Competitive Local Exchange Carriers (CLECs) such as PaeTec Communications Inc. As a result of their relationships with CLECs such as PaeTec, Cybertech will be in a position to leverage their CLEC partners' sizable sales forces, as well as thousands of business customers in the CLECs markets around the United States.

The foregoing includes forward-looking statements, such as Adaptive Broadband's potential success in product development, that involve risks and uncertainties. Actual events or results may differ materially from those suggested by the forward-looking statement. Factors that could cause actual events or results to differ materially include, but are not limited to, fluctuations in quarterly results, delays in receipt of orders or in the shipment of products, delays in the development of data communications and Internet markets and delays in product enhancements. For a more detailed discussion of these and other factors, see "Risk Factors" contained in Adaptive Broadband's Annual Report on Form 10-K for the fiscal year ended June 30, 1999.