Milpitas, Calif. and Newport, R.I. May 13, 2002 - Aperto Networks, a leading provider of next generation point-to-multipoint fixed broadband wireless access (F-BWA) systems, today announces that it has been selected to provide last-mile access solutions for TowerStream, the leading fixed wireless broadband provider in the Northeast United States.

Aperto's flagship system, PacketWave, is being deployed in all existing and new TowerStream POP and subscriber locations. The carrier, in operation across the Boston metro area and in greater Rhode Island since 2000, is expanding its service territory in numerous Northeastern US metropolitan areas. TowerStream's portfolio of applications for demanding small and medium-sized business users includes broadband wireless connectivity at T-1 or greater speeds for Internet access and LAN interconnection, as well as wireless route diversity for disaster recovery.

"We've been highly successful as a top-tier alternative to wireline WAN services for enterprise connectivity," stated Philip Urso, CEO of TowerStream. "Our value proposition is extremely attractive: equivalent or superior connectivity at half the price of telco T-1, flexible and highly reliable Class of Service options, and service installs within 14 days of order. No one else in our markets can serve enterprise users better, faster, more cost-effectively or flexibly than we can. As a result, we're adding business subscribers as fast as we can. Aperto's capabilities and support fit hand-in-glove with our business model and growth plans."

"TowerStream is an outstanding example of the new and successful next-generation carrier," stated Reza Ahy, CEO and Chairman of Aperto Networks. "The company is very focused on initially serving business subscribers with tiered services, they are fast-moving and agile, but very selective in choosing the best opportunities for market success."

"Aperto's PacketWave system is a great fit for our demanding customers and the aggressive SLAs (service level agreements) we offer them," added Jeff Thompson, TowerStream's Chief Technical Officer. "In fact, Aperto is the only second-generation F-BWA vendor who fully met our requirements. No one else was even close. Because of innovations like ServiceQ™ and OptimaLink™, we are now able to implement new services such as Voice over IP and 802.11 hot spot backhaul, to meet expressed user needs."

"TowerStream really did its homework in thoroughly evaluating requirements and capabilities," confirmed Alan Menezes, VP of marketing for Aperto Networks. "They are defining the sweet spot of second-generation wireless service providers, paying close attention to real user demand, delivering dependable and scalable technologies, and sustainable operation. They have taken a leadership role and are making a strong positive impact in the current market environment."

TowerStream evaluated six other FBWA equipment providers before selecting Aperto Networks to provide its broadband service delivery access solution. Its contract with Aperto Networks represents a multi-million dollar commitment for CY 2002.

About Aperto Networks
Aperto Networks is a leading provider of multiservice fixed broadband wireless access systems. The company was founded to provide a breakthrough solution to one of today's critical network bottlenecks - last-mile broadband access. With practical, scalable systems and patent-pending technology that support new wireless builds and complement existing wireline broadband access technology, Aperto addresses service provider needs for rapid network deployment, multiservice scalability, ease of installation and cost-effectiveness. Aperto will dramatically shorten the lengthy provisioning cycles of broadband services by enabling rapid service provisioning across dense urban to suburban locations. Investors in Aperto include Alliance Ventures, Tyco Ventures, Innovacom (France Telecom), DMC Stratex Networks, Oki Electric Industry Company, Mitsubishi International Corporation, Ridgewood Capital, Satwik Ventures and Redwood Ventures. For more information on Aperto Networks , go to www.apertonet.com.

About TowerStream
TowerStream is the leading fixed wireless broadband provider in the Northeast. The company's last mile delivery leverages superior wireless technology developed jointly with partners such as Aperto Networks, Western Multiplex and Cisco. TowerStream presently serves New England markets, including the greater Boston and Providence areas, and is aggressively expanding coverage throughout the region. TowerStream delivers high-speed Internet access to commercial bandwidth users through second-generation point-to-multipoint fixed wireless broadband networks. TowerStream offers customers lower costs and greater reliability than traditional wire line networks, and provides bandwidth on demand and wireless redundancy. For more information on TowerStream services and offerings, please visit www.towerstream.com or call 401-848-5130.

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