Jeju-Mainland 2

Jeju-Mainland 2 is a 191 km domestic submarine cable operated by KT Corporation, connecting Jeju Island to the South Korean mainland via landing points at Goheung and Goseong-ri. Deployed in 1996 using SDH/SONET transmission technology, it is part of a series of Jeju-Mainland cables that ensure telecommunications redundancy for Jeju — South Korea's largest island with a population of over 670,000. LS Cable & System, Korea's dominant submarine cable manufacturer, built the subsequent Jeju-Mainland 3 system and also maintains Korea's first HVDC submarine power link to the island. GeoCables monitors latency on this route using RIPE Atlas probes to detect performance anomalies.