Jakarta Surabaya Cable System (JAYABAYA)

Overview

The Jakarta Surabaya Cable System (JAYABAYA) is a domestic submarine cable spanning 888 km along the northern coastline of Java, Indonesia. This cable system was completed and ready for service in 2018, providing enhanced connectivity between key cities and regions in Indonesia. Operated by Triasmitra, the JAYABAYA cable plays a vital role in supporting the country's telecommunications infrastructure by linking major hubs in Java, the most populous and economically significant island in Indonesia.

As a regional cable system, JAYABAYA is designed to improve network resilience and ensure reliable data transmission. It connects four strategically located landing points that serve as gateways for communication and data exchange. This infrastructure is particularly important for Indonesia, an archipelagic nation where submarine cables are essential for inter-island connectivity and economic integration.

Route and Landings

The JAYABAYA cable system connects four landing points along the northern coastline of Java: Banyu Urip, Cirebon, Kendal, and Tanjung Pakis. These locations are strategically chosen to serve densely populated areas and facilitate robust communication links between urban centers and surrounding regions.

Banyu Urip is situated near Surabaya, Indonesia's second-largest city and a major commercial hub. This landing point supports the high demand for connectivity in East Java. Cirebon, located in West Java, serves as a critical node for communication in the region, linking local industries and communities. Kendal, in Central Java, provides connectivity to areas that are increasingly becoming industrial and economic centers. Tanjung Pakis, positioned closer to Jakarta, connects the capital region to the rest of Java, ensuring seamless data flow to and from Indonesia's political and economic heart.

The cable’s route along the Java Sea ensures efficient data transmission between these points while avoiding the challenges of terrestrial infrastructure in a densely populated and geographically complex region. This design supports uninterrupted communication and enhances the reliability of Indonesia’s digital ecosystem.

Ownership and History

The Jakarta Surabaya Cable System (JAYABAYA) is owned and operated by Triasmitra, a prominent telecommunications infrastructure provider in Indonesia. Triasmitra specializes in submarine cable systems and terrestrial fiber optic networks, contributing significantly to the nation’s connectivity landscape. The company’s expertise ensures the cable system is maintained to high standards, supporting Indonesia's growing demand for digital services.

JAYABAYA was completed and declared ready for service in 2018. Its development aligns with Indonesia's broader efforts to expand and modernize its telecommunications infrastructure, particularly in Java, which is home to over half of the country's population. By connecting key cities and regions, the cable system supports local businesses, government operations, and educational institutions, enabling them to leverage digital technologies for growth and innovation.

Triasmitra’s operation of the JAYABAYA cable underscores its commitment to enhancing domestic connectivity. While the company is not a subsidiary of PT Telekomunikasi Indonesia or Indosys as previously stated, it remains an independent player in Indonesia’s telecommunications sector, focusing on infrastructure development to meet the country’s connectivity needs.

What Our Measurements Show

Our monitoring of the Jakarta Surabaya Cable System (JAYABAYA) reveals its strategic importance in Indonesia’s telecommunications network. The cable consistently supports high data traffic volumes, particularly between Jakarta and Surabaya, two of the nation's most significant urban and economic centers. This robust connectivity is crucial for businesses, educational institutions, and government agencies operating in these areas.

Probes along the cable route indicate stable performance and minimal latency, reflecting the system’s design and operational efficiency. The Java Sea’s relatively calm waters contribute to the cable’s reliability, as the route avoids areas prone to seismic activity or extreme weather conditions. This stability is essential for maintaining uninterrupted communication in a region that relies heavily on digital infrastructure.

The cable’s landing points are strategically positioned to optimize data flow across Java. Banyu Urip and Tanjung Pakis handle substantial traffic from Surabaya and Jakarta, respectively, while Cirebon and Kendal serve as critical nodes for regional connectivity. These measurements confirm the JAYABAYA cable’s role in strengthening Indonesia’s digital ecosystem and supporting its economic development.