In 1866, the first successful transatlantic telegraph cable was laid from the UK to Newfoundland, North America. That marks over 150 years of undersea communication.

The journey wasn’t easy. The first three attempts failed when the cables broke, the fourth lasted only four weeks, and it was the fifth attempt that finally succeeded. Imagine a world where sending a message from Europe to North America relied on ships carrying letters across the ocean.

From Landlines to Mobile Phones

 

 

Fast forward to today, and telephone connectivity is almost ubiquitous. Mobile phones allow us to communicate anywhere, and traditional landlines are increasingly rare. Many people now rely exclusively on mobiles, while telephone boxes – those iconic red symbols of British streets – are mostly reserved as heritage landmarks or emergency phones.

The pace of change in communications technology has been extraordinary. Where once messages took days to cross the Atlantic, now we expect instantaneous connections across the globe.

The Modern Transatlantic Cable

 

 

Today’s transatlantic cables carry far more than telegraphs or phone calls – they transmit internet traffic at astonishing speeds. One notable project, a collaboration between Microsoft and Meta (formerly Facebook), laid a 4,100-mile undersea internet cable capable of transmitting 160 terabits per second.

Phase one connects Virginia, USA, to Bilbao, Spain, with future plans to extend to Africa, the Middle East, and Asia. Google is also actively investing in undersea cables linking the US with Japan, South America, and Asia. These modern cables form the backbone of global internet connectivity, supporting everything from streaming video to cloud computing and real-time business communications.

From Telegraph to Terabits: A Technology Leap

 

 

The original 1866 cable was laid by literally throwing it overboard from ships, whereas today’s cables involve precise engineering, advanced materials, and careful routing to avoid underwater hazards such as the Mid-Atlantic Ridge. Modern cables must also account for tectonic movements and environmental conditions, ensuring reliability and durability.

The evolution from telegraph to high-speed internet demonstrates how far communication technology has come in just 150 years – from messages taking weeks to traverse oceans to real-time global connectivity supporting business, entertainment, and personal communication.