Jakarta-Bangka-Bintan-Batam-Singapore (B3JS)

Overview

The Jakarta-Bangka-Bintan-Batam-Singapore cable, commonly referred to as B3JS, is a regional submarine cable system connecting Indonesia and Singapore. With a total length of 1,031 km, it serves the corridor between the Indonesian archipelago and Singapore, linking several Indonesian islands and the capital Jakarta to the Singaporean coast. The system is entirely owned by Indonesian telecommunications infrastructure provider Moratelindo.

Route and Landings

In Indonesia, the cable lands at five points: Batam, Batu Prahu, Bintan, Jakarta, and Pesaren. These landings span the western Indonesian archipelago, including the islands of Batam and Bintan in the Riau Islands province as well as the Indonesian capital on the island of Java.

In Singapore, the cable lands at Tanah Merah, on the eastern coast of the main island.

Ownership and Operators

B3JS is wholly owned by Moratelindo (PT Mora Telematika Indonesia), an Indonesian telecommunications company that operates fiber and submarine cable infrastructure across the Indonesian archipelago and into neighbouring countries.

Status and Timeline

B3JS entered service in 2012 and has been operational for approximately 14 years. The status of the cable is unknown, but it likely continues to provide connectivity across its Indonesian and Singaporean landing points.

Strategic Context

The Indonesia–Singapore corridor is served by a range of submarine cables spanning very different scales. The regional peers in this corridor include long-haul international systems such as EAC-C2C (36,500 km, RFS 2002), PEACE Cable (25,000 km, RFS 2022), SeaMeWe-6 (21,700 km, RFS 2026), Asia-America Gateway (20,000 km, RFS 2009), Bifrost (19,888 km, RFS 2025), and APCN-2 (19,000 km, RFS 2001). At 1,031 km, B3JS is considerably shorter than most cables touching the same countries — longer than approximately 29% of the 52 other cables in this corridor — reflecting its purpose as a regional intra-archipelago and short-haul link rather than a transoceanic system.

Performance measurements from the past 60 days, based on 230 ping tests, show an average round-trip latency of 77.0 ms, with a best recorded latency of 7.1 ms.

B3JS provides direct submarine connectivity between Jakarta and multiple Indonesian island communities — including Batam and Bintan — and extends onward to Singapore. With five landing points across Indonesia and one in Singapore, the system supports intra-Indonesian island connectivity alongside the broader Indonesia–Singapore link, serving a corridor that carries both domestic and cross-border data traffic. Its concentration of Indonesian landings distinguishes it from the predominantly long-haul international cables that also touch these two countries.