How Sea Cables Support Global Connectivity
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July 20, 2026 by Robert Dalton

Today, we are all familiar with fiber as it connects our homes and offices. Fiber is also the best underlying technology to provide connectivity around the globe. Terrestrial fiber connects cities within a region and submarine cables connect continents. Using subsea cables for global communication is not a new concept, as sea cables have been around for over 150 years. Today, there are over 500 commercial submarine cables in service globally, spanning more than 1 million miles. The newest sea cables now use Space Division Multiplexing technology and have up to 480Tb capacity.

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