CNBC November 8, 2025
Key Points
– Undersea cables carry hundreds of terabits of international data per second, including government communications, financial transactions, email, video calls and streaming.
– Investment into new subsea cable projects is expected to reach around $13 billion between 2025-2027.
– Tech giants Meta, Google, Amazon and Microsoft are investing in the cables as part of the AI push.
Over 95% of international data and voice call traffic travels through nearly a million miles of underwater communication cables.
These cables carry government communications, financial transactions, email, video calls and streaming around the world.
The first commercial telecommunication subsea cable was used for telegraphs and was laid across the English Channel between Dover, England and Calais, France in 1850.
The technology...
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