Seren Juno and Ribbon Achieve 20Tbps Transmission on 10,000 km JUNO Trans-Pacific Cable
MWN-AI** Summary
On November 12, 2025, Ribbon Communications Inc., a leader in real-time communications technology, announced the successful completion of a significant field trial demonstrating 20 terabits per second (Tbps) optical transmission over its 10,000 km JUNO trans-Pacific submarine cable, developed by Seren Juno. This milestone confirms the potential for state-of-the-art optical networking and highlights Ribbon’s capability to support the growing global demand for high-speed connectivity.
The JUNO cable system, anticipated to be the largest trans-Pacific cable linking Japan and the U.S., boasts a total capacity exceeding 350Tbps through its 20 fiber pairs. This infrastructure is particularly crucial as the digital economy expands and necessitates robust international connectivity. According to Sam Bucci, EVP and COO of Ribbon, these outcomes showcase the scalability of their Apollo technology platform, which can effortlessly transmit 20Tbps over extended distances.
This trial involved Ribbon's Apollo 9408 transponder, utilizing advanced 5nm 140GBaud technology, alongside the Apollo 9608 platform, which offers submarine-grade optical line system functions. The Apollo 9408 supports modulation flexibility ranging between 400Gbps to 1.2Tbps per wavelength, optimizing performance based on various cable conditions.
Yoshio Sato, CEO of Seren Juno, expressed confidence in the results, suggesting that this technological achievement positions Ribbon as a strong contender in the market, potentially reshaping strategic options. The JUNO submarine system, established as a joint venture involving major corporations such as NTT Ltd., aims to provide secure and high-capacity international connectivity, meeting the demands of the evolving digital landscape.
For a detailed overview of Ribbon’s offerings and sustainability commitments, more information can be found at [rbbn.com](https://www.rbbn.com) and [seren-juno.com](https://www.seren-juno.com).
MWN-AI** Analysis
The recent announcement of Seren Juno and Ribbon Communications successfully achieving 20Tbps transmission over the 10,000 km JUNO trans-Pacific cable is a pivotal development in the telecommunications sector. This milestone sets the stage for significant advancements in network infrastructure, offering a lucrative investment landscape for stakeholders in the tech and communications industries.
Ribbon's advanced technologies, particularly the Apollo 9408 transponder and its low-power counterpart, the Apollo 9608 platform, enable flexible modulation that optimizes performance across varying cable conditions. This adaptability not only enhances the operational efficiency of submarine communications but also positions Ribbon as a formidable player in an increasingly competitive market.
Investors should note the strategic implications of this achievement. As global data consumption surges, the demand for high-capacity, reliable networks is on the rise. JUNO, with its design capacity of 350Tbps across 20 fiber pairs, is poised to meet this demand, potentially outperforming competitors and capturing a significant share of the trans-Pacific bandwidth market.
From a market perspective, companies involved in submarine cable operations or real-time communication technologies could see increased valuations and investor interest. Ribbon Communications (Nasdaq: RBBN) stands out, with its innovative solutions likely to propel its stock performance as demand for its offerings grows.
Moreover, the joint venture nature of Seren Juno, backed by established players like NTT and Mitsui, instills confidence in the operational prowess and market adaptability of the system. Therefore, investors should consider diversifying their portfolios with stakes in companies leveraging next-generation networking technologies to capitalize on this burgeoning sector.
In summary, the successful transmission trial is a strong signal for growth in broadband infrastructure and presents viable investment opportunities within the tech space.
**MWN-AI Summary and Analysis is based on asking OpenAI to summarize and analyze this news release.
PR Newswire
PLANO, Texas, Nov. 12, 2025 /PRNewswire/ -- Ribbon Communications Inc. (Nasdaq: RBBN), a global leader in real-time communications technology and IP optical networking solutions, today announced the successful completion of a 20Tbps optical transmission field trial on the 10,000 km JUNO trans-Pacific submarine cable, developed and operated by Seren Juno. Ribbon's mission is to help service providers, enterprises and critical infrastructure operators worldwide modernize and secure their networks and services.
Set to become the largest trans-Pacific cable system between Japan and the U.S., JUNO will deliver more than 350Tbps of total capacity across 20 fiber pairs, supporting growing global demand for high-speed connectivity.
"This is a significant milestone in long-haul optical networking, confirming the feasibility of transmitting 20 terabits per second per fiber pair," said Sam Bucci, Ribbon EVP and COO, Ribbon. "Our Apollo platform's ability to deliver 20Tbps over 10,000 km showcases the scalability and robustness of Ribbon's technology for next-generation global connectivity."
"Achieving results that rival those of leading competitors gives us confidence that this could become one of our new strategic options," said Yoshio Sato, CEO, Seren Juno.
The trial featured Ribbon's Apollo 9408 transponder, powered by advanced 5nm 140GBaud technology, and the Apollo 9608 platform, which integrates submarine-grade optical line system functions. The Apollo 9408 supports flexible modulation from 400Gbps to 1.2Tbps per wavelength, enabling performance optimization tailored to cable conditions. Combined with the compact, low-power Apollo 9608, Ribbon sets a new benchmark for submarine optical transmission.
About Ribbon
Ribbon Communications (Nasdaq: RBBN) delivers secure cloud communications and IP and optical networking solutions to service providers, enterprises and critical infrastructure sectors globally. We engage deeply with our customers, helping them modernize their networks for improved competitive positioning and business outcomes in today's smart, always-on and data-hungry world. Our end-to-end portfolio of communications software and IP Optical networking solutions delivers superior value and innovation by leveraging cloud-native architectures, automation and analytics tools, and leading-edge security. We maintain a keen focus on our commitments to Environmental, Social, and Governance (ESG) matters, offering an annual Sustainability Report to our stakeholders. To learn more about Ribbon, please visit rbbn.com
Important Information Regarding Forward-Looking Statements
The information in this release contains forward-looking statements regarding future events that involve risks and uncertainties. All statements other than statements of historical facts contained in this release, including those regarding the expected benefits from use of Ribbon Communication's products, are forward-looking statements. The actual results of Ribbon Communications may differ materially from those contemplated by the forward-looking statements. For further information regarding risks and uncertainties associated with Ribbon Communications' business, please refer to the "Risk Factors" section of Ribbon Communications' most recent annual or quarterly report filed with the SEC. Any forward-looking statements represent Ribbon Communications' views only as of the date on which such statement is made and should not be relied upon as representing Ribbon Communications' views as of any subsequent date. While Ribbon Communications may elect to update forward-looking statements at some point, Ribbon Communications specifically disclaims any obligation to do so.
Investor Contact
+1 (978) 614-8050
ir@rbbn.com
Media Contact
Catherine Berthier
+1 (646) 741-1974
cberthier@rbbn.com
About Seren Juno Network Co., Ltd.
Established in July 2022 as a joint venture between NTT Ltd. Japan Corporation, Mitsui & Co., Ltd., PC Landing Corp., and JA Mitsui Leasing, Ltd., Seren Juno Network Co., Ltd. is the owner and operator of the JUNO submarine cable system. JUNO is a next-generation trans-Pacific cable spanning approximately 10,000 km between Japan and the United States, featuring 20 fiber pairs (40 optical cores) and a design capacity of up to 350 Tbps. Seren Juno's mission is to provide secure, scalable, and high-capacity international connectivity to meet the rapidly growing demands of the digital economy. For more information, please visit: https://www.seren-juno.com/.
SOURCE Ribbon Communications Inc.
FAQ**
How does the successful completion of the 20Tbps optical transmission field trial by Ribbon Communications Inc. (Nasdaq: RBBN) position the company competitively in the optical networking market?
What specific advancements in technology enabled Ribbon Communications Inc. (RBBN) to achieve such high transmission speeds over the 10,000 km JUNO cable?
Considering the importance of environmental and governance measures, how does Ribbon Communications Inc. (Nasdaq: RBBN) plan to ensure that its operations alongside Seren Juno align with its ESG commitments?
What are the potential implications for global connectivity and data traffic rates with the launch of the JUNO submarine cable system operated by Seren Juno Network Co., Ltd. in partnership with Ribbon Communications Inc. (RBBN)?
**MWN-AI FAQ is based on asking OpenAI questions about Ribbon Communications Inc. (NASDAQ: RBBN).
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