Press Release

Harmonic's cOS Platform Unifies DOCSIS 4.0 Options and 10G Fiber

October 16, 2023

Enhanced cOS Broadband Platform Hits Major Milestone Powering Multigigabit Symmetric Service Over a Live Production System

SAN JOSE, Calif., Oct. 16, 2023 /PRNewswire/ -- Harmonic (NASDAQ: HLIT) today announced that its market-leading cOS™ broadband platform (formerly CableOS®) and hybrid network edge devices have achieved successful live production delivery of multigigabit symmetric speeds leveraging DOCSIS 4.0 and 10G PON technology. 

"Harmonic's versatile cOS platform and network edge devices bring a new level of flexibility and capacity to broadband service providers during this critical time of multigigabit service expansion and evolution," says Nimrod Ben-Natan, Senior Vice President and General Manager of Broadband Business at Harmonic. "More than ever before, broadband operators require greater agility to define and implement network strategy and we are excited to again be at the forefront in delivering transformative new capabilities."

The cOS platform offers the industry's first solution to unify both variants of DOCSIS 4.0, Full Duplex (FDX) and Extended Spectrum (ESD), as well as 10G fiber technologies for the inside and outside plant, consolidating management of cable and fiber network assets into one system. The cOS platform enables operators to deliver multigigabit speeds regardless of physical wiring or existing infrastructure, further accelerating time to market of high-value new services and a more seamless multigigabit network evolution. 

"Our joint work with Harmonic has created and fueled years of incredible network innovation, growth, and operational excellence," said Elad Nafshi, Chief Network Officer, Comcast. "We embarked on our DAA journey by digitizing our Access Network through the vCMTS and scaled that across the country to put us in a position to introduce the world's first DOCSIS 4.0-powered Internet service and seamless fiber optionality. We'll continue to innovate and we're very excited about the benefits it will deliver to consumers, including fast speeds, even better reliability, lower latency, and industry-leading security."

Harmonic's Emmy Award-winning cOS platform powers next-gen broadband services to more than 21 million cable modems for over 100 service providers worldwide, including leading operators in the U.S., Europe, Latin America and Asia.

Harmonic will demonstrate its cOS broadband platform at SCTE Cable-Tec Expo. To schedule a meeting with Harmonic in booth 915, visit Further information about Harmonic and the company's solutions is available at

About Harmonic
Harmonic (NASDAQ: HLIT), the worldwide leader in virtualized broadband and video delivery solutions, enables media companies and service providers to deliver ultra-high-quality video streaming and broadcast services to consumers globally. The company revolutionized broadband networking via the industry's first virtualized broadband solution, enabling cable operators to more flexibly deploy gigabit internet service to consumers' homes and mobile devices. Whether simplifying OTT video delivery via innovative cloud and software platforms, or powering the delivery of gigabit internet cable services, Harmonic is changing the way media companies and service providers monetize live and on-demand content on every screen. More information is available at

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Statements concerning Harmonic's business and the anticipated capabilities, advantages, reliability, efficiency, market acceptance, market growth, specifications and benefits of Harmonic products, services and technology are forward-looking statements. These statements are based on our current expectations and beliefs and are subject to risks and uncertainties, including the risks and uncertainties more fully described in Harmonic's filings with the Securities and Exchange Commission, including its Annual Report on Form 10-K for the year ended Dec. 31, 2022, its Quarterly Reports on Form 10-Q and its Current Reports on Form 8-K. The forward-looking statements in this press release are based on information available to Harmonic as of the date hereof, and Harmonic disclaims any obligation to update any forward-looking statements.

Harmonic, the Harmonic logo and other Harmonic marks are owned by Harmonic Inc. or its affiliates. All other trademarks referenced herein are the property of their respective owners.


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Sarah Kavanagh, Public Relations, +1 408-490-6607,; David Hanover, KCSA Strategic Communications, Investor Relations, +1 212-896-1220,