CANTAT-3 is a submarine telecommunications cable system that was laid on the ocean floor between North America and Europe. It is a joint project between several telecommunications companies, including AT&T, Canada's Teleglobe, and Norway's Telenor. The cable system consists of three segments, with the first segment running from St. John's, Newfoundland to Keflavik, Iceland, the second from Keflavik to Norden, Germany, and the third from Norden to Blaabjerg, Denmark.
CANTAT-3 was first put into service in 1994 and was designed to provide high-speed voice and data communications between North America and Europe. The cable system has a total length of approximately 9,000 kilometers and is capable of transmitting data at speeds of up to 10 Gbps.
The CANTAT-3 cable system has been a critical component of global telecommunications infrastructure for over two decades, providing reliable connectivity between North America and Europe. In recent years, however, newer cable systems with higher capabilities have been installed, but CANTAT-3 still plays an essential role in ensuring adequate connectivity between these two continents.