Elisa deploys undersea cable detection system in Finland

Finland has deployed a new system to monitor undersea cables for signs of physical threats. The network operator Elisa installed distributed acoustic sensors along the seabed to detect vibrations that could indicate tampering or damage. This setup aims to alert authorities and cable owners before any actual harm occurs.

Network operator uses distributed acoustic sensors to detect vibrations and alert authorities before physical damage occurs.

The technology relies on measuring sound waves traveling through the fiber optic cables themselves. When someone cuts, anchors, or otherwise disturbs a cable, the resulting vibration travels through the glass core. The system captures these vibrations and processes them in real time.

Elisa tested the detection setup with the Finnish Border Guard and the Finnish Navy. The company reports that the trials successfully identified irregularities along the monitored routes. The network operator now uses this data to send automatic alerts when suspicious activity is detected.

This technology complements current monitoring methods rather than replacing them. It focuses specifically on physical threats rather than signal degradation or equipment failure. Alerts are sent to authorities, enabling them to deploy vessels for on-site verification when irregularities occur.

Elisa New Business Director Jouni Petrow stated that protecting undersea infrastructure serves a national security purpose. The company emphasized its cooperation with Finnish authorities during the testing phase. The system is designed to provide early warning before damage happens, allowing faster response times.

It remains unclear whether Elisa used technologies or patents from AP Sensing for this deployment. The source material notes uncertainty about the specific technology provider behind the sensors. While this aspect does not affect functionality, it underscores the limited availability of detailed technical information to the public.