History of the Atlantic Cable & Submarine Telegraphy - The History of the Repeater
Submarine communications cable - Wikipedia
The internet isn't in the cloud, it's under the ocean thanks to these cables
Telecom | Free Full-Text | Toward SDM-Based Submarine Optical Networks: A Review of Their Evolution and Upcoming Trends
CS-12M Submarine Coaxial Cable Repeater (1975) : Fujitsu Global
JMSE | Free Full-Text | A Cost-Effective Approach to the Risk Reduction of Cable Fault Triggered by Laying Repeaters of Fiber-Optic Submarine Cable Systems in Deep-Sea