SEA-H2X

Overview

The SEA-H2X is a submarine cable system spanning 6,000 kilometers, designed to connect key locations in Southeast Asia. Scheduled to be ready for service in 2026, it links six landing points across China, Malaysia, the Philippines, Singapore, and Thailand. This cable is a critical addition to the region's telecommunications infrastructure, addressing the growing demand for high-capacity and low-latency data transmission. By interconnecting these countries, SEA-H2X aims to enhance regional connectivity and support the digital transformation of Southeast Asia.

Submarine cables like SEA-H2X play an essential role in global communications, as they carry the majority of international internet and data traffic. This system is expected to bolster economic ties and improve access to digital services in the connected regions, contributing to their economic and technological development.

Route and Landings

The SEA-H2X cable system features six landing points strategically located to maximize its regional impact. In China, it lands at Lingshui and Tseung Kwan O, connecting the mainland and Hong Kong Special Administrative Region. These locations are pivotal for linking China's robust digital economy to the rest of Southeast Asia. In Malaysia, the cable lands in Kuching, the capital of Sarawak, which is a growing hub for technology and commerce on the island of Borneo.

In the Philippines, SEA-H2X lands at La Union, a province in the northern part of Luzon. This landing enhances connectivity for the Philippines, a nation increasingly reliant on digital infrastructure for its economic growth. The cable also connects to Tuas in Singapore, a global financial and technological hub, and Songkhla in Thailand, a key economic and cultural center in the southern region of the country. By crossing the South China Sea and the Gulf of Thailand, the SEA-H2X route reflects the strategic importance of these maritime regions for regional trade and communication.

Ownership and History

The SEA-H2X cable is owned by a consortium of three telecommunications companies: China Mobile, China Unicom, and Converge ICT. China Mobile and China Unicom are two of the largest telecom operators in China, with extensive experience in managing large-scale infrastructure projects. Their participation underscores China's commitment to enhancing digital connectivity with neighboring countries. Converge ICT, a major player in the Philippine telecommunications market, brings its expertise in providing high-speed internet and IT services to the consortium.

Announced with a target ready-for-service date of 2026, SEA-H2X is part of a broader wave of submarine cable developments aimed at meeting the surging demand for data capacity in Southeast Asia. The cable is expected to play a vital role in fostering economic growth and supporting the digital economies of the connected countries. Its construction represents a significant investment in the region's telecommunications infrastructure, ensuring more reliable and efficient data exchange.

What Our Measurements Show

Our live monitoring of the SEA-H2X system, which spans 71 measured corridors, provides valuable insights into its performance. The best round-trip time (RTT) recorded is an impressive 1 millisecond, while the average RTT across all corridors is 187 milliseconds. These metrics highlight the cable's capability to deliver low-latency data transmission, which is essential for applications such as cloud computing, video streaming, and real-time communications.

The SEA-H2X's performance metrics are particularly significant given the geographic expanse it covers, traversing multiple seas and connecting diverse economies. Its ability to maintain low latency and high reliability is a testament to the advanced engineering and planning behind its construction. As the cable becomes operational, it is expected to further enhance the digital connectivity of Southeast Asia, supporting both regional and global data traffic demands.