Press Release

SCTE Cable-Tec Expo 2002

Booth #637

SAN ANTONIO--(BUSINESS WIRE)--June 5, 2002--

        Collaboration Reduces Cost and Complexity of Monitoring
              Network Health From the Headend to the Node

Harmonic Inc. (Nasdaq:HLIT) and AM Communications, Inc. (OTCBB:AMCM) have partnered to integrate Harmonic's broadband networking systems with the AM Communications Omni2000(TM) HFC Network Management System. This initiative, bringing together leaders from broadband access networking and network management, gives cable operators the ability to more completely monitor and manage their environment from the headend to the last mile. The initiative is designed to both reduce the complexity and cost of network management as well as increase network availability.

Through this relationship, AM Communications has added support for all Harmonic(TM) HFC headend and hub-based network transport equipment

• including the PWRLink(TM), MAXLink(TM) and METROLink(TM) transmission systems -- to the Omni2000 system. AM Communications is also providing an HMS-compliant transponder for managing Harmonic's PWRBlazer(TM) optical nodes and the devices they host.

The Omni2000 system's real-time monitoring capabilities and network-wide view give network operators the ability to quickly isolate and resolve problems, eliminating the cost of unnecessary truck rolls. Because network managers only need to learn one management system, overall training costs are also reduced. Furthermore, the ability to manage networks with a single, standards-based system -- rather than separate systems for each vendor's products -- reduces downtime and increases availability.

"To effectively provide reliable, uninterrupted service, operators must have a broad view of their entire network, no matter which vendor's products it contains," said Javad Hassan, Chairman of AM Communications. "As a leading provider of broadband optical networking solutions, Harmonic has a large installed base of systems, making support for their systems an important and logical next step. We already support nearly 300 brands and types of HFC network equipment. Adding support for Harmonic, which was greatly simplified as a result of their open standards-based approach, further strengthens our industry-leading management platform."

"Today's cable service subscribers have little tolerance for network outages," said Patrick Harshman, President of Harmonic's Broadband Access Network Division. "As operators continue to diversify their customer base and introduce more mission-critical services such as IP network access and lifeline telephone service, the network will need to deliver the highest levels of availability. More than 400 broadband data communications and HFC networks around the globe are monitored using solutions from AM Communications. Their expertise and customer orientation made them a natural choice for providing element management for Harmonic HFC products."

Harmonic provided equipment as well as technical resources to support the development and testing process, ensuring quality and compatibility with Harmonic solutions. Customers of AM Communications are already deploying the management platform and transponder supporting Harmonic systems.

About AM Communications

AM Communications, Inc., located in Quakertown, Pa., is a leading supplier of software-driven network reliability solutions for HFC broadband network enterprises. AM's advanced systems and service offerings employ leading-edge technologies that embody the company's 25-plus years of HFC experience and expertise. Through its wholly owned subsidiary, AM Broadband Services, Inc., AM provides technical services and solutions that are software optimized for the telecommunications industry. Services include design, infrastructure development, system activation and certification, network reliability and residential "last mile" fulfillment services. AM's world-class quality credentials include ISO9001 for engineering, business, and operations procedures. Through a strategic partnership with NeST Technologies, AM is the only systems and services provider in the broadband sector that has CMM Level 5 credentials for software development.

About Harmonic Inc.

Harmonic Inc. is a leading provider of digital video, broadband optical networking and IP delivery systems to cable, satellite, telecom and broadcast network operators. Harmonic's open standards-based solutions for the head end through the last mile enable customers to develop new revenue sources and a competitive advantage by offering powerful interactive video, voice and data services such as video-on-demand, high-definition digital television, telephony and Internet access.

Harmonic (Nasdaq:HLIT) is headquartered in Sunnyvale, Calif., with R&D, sales and system integration centers worldwide. The Company's customers, including many of the world's largest communications providers, deliver services in virtually every country. Visit www.harmonicinc.com for more information.

This press release contains forward-looking statements, including, but not limited to, statements relating to the benefits to cable operators of the Harmonic/AM Communications partnership and products, within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. In addition, actual results could differ materially from those projected in the forward-looking statements as a result of the risk factors set forth in documents that Harmonic files with the SEC, including reports on Form 10-K and 10-Q.

Editor's Note: Product and company names used here are trademarks or registered trademarks of their respective companies.

--30--kwp/sf*