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Seren Juno and Ribbon Achieve 20Tbps Transmission on 10,000 km JUNO Trans-Pacific Cable

Source Decision Insights Record Published November 18, 2025 Companies 2
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2 companies named across 2 categories, the first article referencing Juno.

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Ribbon Communications Intelligent Network Controller (INC). (Nasdaq: RBBN) completed a 20 terabits per second (Tbps) optical transmission field trial on the 10,000 km JUNO trans-Pacific submarine cable, developed by Seren Juno. This trial demonstrates the capacity for high-speed connectivity, essential for global demand.

The JUNO cable system, positioned to be the largest trans-Pacific cable between Japan and the U.S., offers over 350Tbps across 20 fiber pairs. This capability facilitates growing needs for enhanced global interconnectivity.

Ribbon's technology, featuring the Apollo 9408 transponder with advanced 5nm 140GBaud capabilities, succeeded in delivering 20Tbps over the extensive distance. “Our Apollo platform’s ability to deliver 20Tbps over 10,000 km showcases the scalability and robustness of Ribbon's technology,” said Sam Bucci, EVP and COO of Ribbon.

Yoshio Sato, CEO of Seren Juno, highlighted the trial's results as competitive: “Achieving results that rival those of leading competitors gives us confidence that this could become one of our new strategic options.”

The Apollo 9408 supports a modulation range from 400Gbps to 1.2Tbps per wavelength, optimizing performance in diverse cable conditions. This trial sets a standard for submarine optical transmission.

Press release, provided by Cision on behalf of Ribbon Communications. Read the original.

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