Subsea communication networks

Nexans Rognan

Connecting communities, regions and countries

All human activities make use of subsea communication networks, to transmit sound, images or data. Connecting all corners of the globe, this invisible network of cables is essential for exchanging information between countries, communities and individuals. Over the coming years, networks will need to increase their capacity to meet the growing needs of a fully digital world.

Challenges associated with subsea communication networks

Global interconnection depends on subsea communications networks. Forming an ecosystem spanning the entire planet, the networks enable the multilateral exchange of information and data, primarily over the Internet. The amount of information and data transmitted via this complex system is growing constantly. Network capacity and speed need to increase accordingly.

In other words, it is essential to make high-speed networks (very high transmission speed) and broadband networks (very high network capacity) more widely available as a prerequisite for improving global coverage. To connect continents, countries and individuals, subsea communications networks need to include more optical fiber, to transmit large quantities of data at speed over long distances under the sea.

At Nexans, we have more than a century of experience in laying subsea communication cables in extreme conditions. Our solutions are installed over short distances, in fjords and rivers, for example, as well as between continents, through our interconnectors.


optical fibers enable simultaneous voice calls between 300 million people

average increase of


per year, of the global demand for bandwidth


Nexans solutions

  • Set a world record with the Odin subsea cable containing 2,016 fibers (source).
  • Deliver over 65,000 km of subsea fiber optic cables worldwide.
  • Develop high-quality communications solutions.
  • Connect local, regional and national networks.
  • Supply complete installations for subsea fiber optic cables, from pre-qualification and design to custom production, logistics, implementation and testing.
  • Produce fiber-optic cables equipped with a large number of fibers, the only technology able to transmit huge quantities of information at high speed.

Nexans has been supplying subsea telecommunications cables for over 30 years and will continue to be the partner of choice for regional systems for many years to come.

Hans Christian Nilsen

STSC Sales and Marketing Director, Nexans

Nexans Roga

Our objectives

  • Contribute to the development of regional and international telecommunications networks.
  • Enable players in the interconnection industry to meet growing demand.

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Frequently asked questions about subsea communication networks