SJJK

Overview

SJJK is a domestic submarine cable system serving Indonesia, with a total length of 543 km. All five of its landing points lie within Indonesian territory, making it an intra-national cable connecting several islands and coastal locations across the Indonesian archipelago. It operates within one of the world's most active submarine cable corridors, serving a country with an extensive network of undersea infrastructure spanning dozens of systems.

Route and Landings

In Indonesia, SJJK lands at five locations: Anyer, Bawean, Kalianda, Takesung, and Ujung Pankah. These landings span multiple islands and coastal sites, providing connectivity across geographically dispersed parts of the archipelago. No specific routing order is stated; each landing point represents a connection within the broader domestic network the cable forms.

Ownership and Operators

SJJK is owned by XLSmart, which holds sole ownership of the system. XLSmart is an Indonesian telecommunications operator formed through the merger of XL Axiata and Smartfren, operating mobile and fixed broadband services across Indonesia.

Status and Timeline

SJJK entered service in 2008 and has been operational for approximately 18 years. No end-of-service date has been indicated, and the cable continues to function as part of Indonesia's domestic submarine infrastructure.

Regional Context

Indonesia hosts 40 submarine cables landing across 97 landing points, reflecting the country's geographic nature as an island nation requiring extensive undersea connectivity. SJJK's 543 km length places it in the shorter segment of cables touching this corridor — longer than approximately 25% of the other cables serving Indonesian waters — which is consistent with its role as a short-haul domestic link rather than a long-distance international system.

Several cables active in the same corridor are considerably longer international systems, including Bifrost and Echo (both with ready-for-service dates in 2025), Apricot (also 2025), Hawaiki Nui 1 (planned for 2027), Asia Connect Cable-1 (ACC-1) (planned for 2028), and Asia United Gateway East (AUG East) (planned for 2029). These range from roughly 8,900 km to nearly 20,000 km in length. SJJK operates on a fundamentally different scale, focusing on inter-island connectivity within Indonesian territory rather than transoceanic reach.

Strategic Role

By connecting five domestic landing points across the Indonesian archipelago, SJJK provides intra-national submarine bandwidth to coastal and island communities that are otherwise separated by sea. Its relatively compact footprint at 543 km reflects the specific inter-island distances it was designed to bridge, complementing both terrestrial networks and the larger international cables that also terminate in Indonesia.