Longest fiber optic cable

Fibre-optic Link Around the Globe (FLAG) is a 28,000-kilometre-long (17,398 ; 15,119 ) mostly- that connects the, , and many places in between. The cable is operated by, a subsidiary of. The system runs from the eastern coast ofto Japan. Its Europe–Asia segm...

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Longest fiber optic cable

The longest fiber optic cable in the world is Meta's Project Waterworth, stretching 50,000 kilometers across five continents.Overview of Project WaterworthProject Waterworth, developed by Meta, is a subsea fiber-optic cable spanning 50,000 km, making it the longest ever constructed, surpassing the circumference of the Earth . It connects the U.S., South America, Africa, India, and other regions, providing a global backbone for high-speed internet, cloud services, and AI applications . The cable is designed for resilience, capable of withstanding depths of 7,000 meters and protected in shallow zones, and features a 24-fiber-pair capacity, far exceeding most existing cables .Historical Longest CablesBefore Project Waterworth, the SEA-ME-WE3 cable held the record as the longest operational submarine fiber-optic cable. Completed in 2000, it stretches 39,000 km (24,000 miles) and links Southeast Asia, the Middle East, Western Europe, Australia, and Japan . SEA-ME-WE3 employs Wavelength Division Multiplexing (WDM) and Synchronous Digital Hierarchy (SDH) technology to maintain high data capacity and signal quality over long distances . It was managed by Singtel, with leadership from France Telecom and China Telecom, and involved 92 international telecom operators . Another notable cable is the Fibre-optic Link Around the Globe (FLAG), which spans 28,000 km and connects the UK, Japan, India, and other countries . FLAG was first placed into commercial service in 1997 and was historically one of the longest cables, supporting over 120,000 voice channels .Significance of Long Submarine CablesThese long fiber-optic cables are critical for global internet infrastructure, enabling high-speed data transfer, international communication, and cloud computing. They form the backbone of the internet, connecting continents and supporting billions of users worldwide. Modern cables like Project Waterworth are also designed to enhance connectivity in underserved regions and provide redundancy to reduce outages caused by natural hazards or cable cuts .SummaryCurrent longest cable: Project Waterworth – 50,000 km, connecting five continents Previous record-holder: SEA-ME-WE3 – 39,000 km, linking Southeast Asia, Middle East, Western Europe, Australia, and Japan Other notable cables: FLAG – 28,000 km, connecting UK, Japan, India, and more These cables demonstrate the scale and complexity of global telecommunications infrastructure, highlighting the engineering feats required to maintain worldwide connectivity.
Longest Fiber Optic Cable

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The Fibre-optic Link Around the Globe (FLAG) is a 28,000-kilometers long fiber-optic communications cable that connects the UK, Japan, India, and several other countries.

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Fibre-optic Link Around the Globe

OverviewDescriptionSegments and landing pointsDisruptionsGCHQ interceptionSee also

Fibre-optic Link Around the Globe (FLAG) is a 28,000-kilometre-long (17,398 mi; 15,119 nmi) fibre optic mostly-submarine communications cable that connects the United Kingdom, Japan, India, and many places in between. The cable is operated by Global Cloud Xchange, a subsidiary of RCOM. The system runs from the eastern coast of North America to Japan. Its Europe–Asia segment was the fourth longest cable in the world in 2008.

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