Taiwan Activates Backup Communications After Undersea Cable Break on Dongyin Island

Taiwan has activated emergency backup communications for Dongyin, its northernmost and strategically important island, after an undersea cable was damaged due to shifting shipwreck debris caused by severe weather. The incident highlights ongoing concerns over the vulnerability of Taiwan’s undersea communication cables, particularly those connecting remote islands.

Dongyin, home to approximately 1,500 residents, is located at the northern edge of the Taiwan Strait and holds significant military importance. With no airport access, the island depends entirely on ferry services from Taiwan, making reliable communication infrastructure critical for both civilians and defense operations.

According to Taiwan’s Ministry of Digital Affairs, the damaged cable connects Dongyin to Beigan in the Matsu island group, which lies close to China’s coastline. Following the disruption, authorities quickly deployed a microwave communication backup system. This system has successfully restored essential services, ensuring that mobile networks, voice calls, and internet access continue to function normally across the island.

However, some disruptions remain. Cable television services are currently unavailable, and users may experience minor internet delays due to ongoing weather conditions. Repair work is being carried out by Chunghwa Telecom, with completion expected by the end of July, depending on weather stability.

This event underscores Taiwan’s longstanding concerns about undersea cable security. In 2023, two cables linking the Matsu islands were severed, causing a widespread internet outage. While Taiwanese officials attributed the damage to Chinese vessels, no direct evidence of intentional interference was confirmed.

To strengthen communication resilience, Taiwan has been investing in alternative technologies, including low-Earth-orbit satellite systems for remote regions. These efforts aim to ensure uninterrupted connectivity in emergencies, particularly amid rising geopolitical tensions with China.