Indonesia Tengah Cable Systems: A planned regional submarine network
The Indonesia Tengah Cable Systems is a planned submarine cable network designed to enhance connectivity across central Indonesia. Spanning approximately 2,641 kilometers, it will connect ten landing points, including
Baubau,
Kawinda Nae,
Kendari,
Labuhan Bajo,
Luwuk,
Makassar,
Morowali,
Sanur,
Selayar, and
Wakatobi. The cable is expected to be ready for service in 2027, according to GeoCables data. Ownership is shared between PT Jejaring Mitra Persada and Triasmitra, both of which are active players in Indonesia's telecommunications infrastructure sector.
What makes this cable particularly interesting is the uncertainty surrounding its technical specifications, including design capacity, fiber pair count, and supplier details. These parameters have not been disclosed in publicly available sources, leaving room for speculation about its ultimate capabilities. Additionally, its role in complementing or competing with existing cables in the region, such as the
Palapa Ring Middle and the
Indonesia Global Gateway (IGG) System, will be a key aspect to monitor once operational.
Quick facts
| Name | Indonesia Tengah Cable Systems |
| Length | 2,641 km |
| Ready for Service | 2027 (GeoCables database) |
| Owners | PT Jejaring Mitra Persada, Triasmitra |
| Status | Planned - not yet in operation |
| Design Capacity | Not disclosed |
| Fiber Pairs | Not disclosed |
| Supplier | Not disclosed |
| Landing Points | Baubau, Kawinda Nae, Kendari, Labuhan Bajo, Luwuk, Makassar, Morowali, Sanur, Selayar, Wakatobi |
🗺 Show Indonesia Tengah Cable Systems on the interactive cable map
Route
The Indonesia Tengah Cable Systems will traverse the central region of Indonesia, connecting ten landing points spread across Sulawesi, Bali, and surrounding islands. The cable's route reflects the strategic importance of linking smaller cities and islands to larger hubs such as Makassar and Sanur. Makassar, in particular, is a major economic and telecommunications hub in eastern Indonesia, while Sanur serves as a gateway to Bali's international connectivity.
Each landing point is also connected to other submarine cables, creating opportunities for redundancy and network optimization. For example, Baubau is linked to the Palapa Ring Middle, and Makassar hosts multiple cables, including the Indonesia Global Gateway (IGG) System and the
Asia Connect Cable-1 (ACC-1).
Why it was built and what it carries
The Indonesia Tengah Cable Systems is being developed to address the growing demand for reliable and high-speed internet connectivity in central Indonesia. This region includes many smaller islands and cities that have historically been underserved by telecommunications infrastructure. By connecting these areas to larger hubs, the cable aims to support economic development, digital inclusion, and improved access to cloud services and content delivery networks.
Although the cable's design capacity has not been disclosed, it is expected to carry significant amounts of data traffic, serving both domestic and international needs. Its role in complementing existing cables in the region will be critical in ensuring network resilience and capacity expansion.
History: what can be established
GeoCables data records the Indonesia Tengah Cable Systems as planned, with a ready-for-service date of 2027. No conflicting dates have been identified in industry sources, but since the cable is not yet operational, future delays or changes to the timeline remain possible. The involvement of PT Jejaring Mitra Persada and Triasmitra indicates a focus on regional connectivity, as both companies have experience in building and managing submarine cable systems in Indonesia.
Capacity and technology
Publicly available sources do not disclose the design capacity, fiber pair count, or supplier details for the Indonesia Tengah Cable Systems. Without operator documentation, it is impossible to state these parameters definitively. However, given the cable's planned role in connecting multiple regional hubs, it is likely to employ modern submarine cable technology, potentially including wavelength division multiplexing (WDM) to maximize data throughput.
Latency: the physics
Theoretical latency calculations for the Indonesia Tengah Cable Systems suggest a one-way light propagation time of approximately 12.9 milliseconds over its 2,641 km length. The round-trip time (RTT) floor over the wet segment is estimated at 25.9 milliseconds. These values represent the physical limits of light traveling through fiber optic cables, assuming speeds between 200,000 and 204,000 km/s.
Real-world latency will be higher due to additional factors such as land tails, terminal equipment processing, and routing inefficiencies. For example, live measurements from remote probes show significantly higher RTTs for connections involving Morowali, one of the cable's landing points. These measurements, however, reflect the full internet path and not the cable itself, and any RTT below the theoretical floor is a measurement artifact.
Redundancy: what happens if it breaks
The Indonesia Tengah Cable Systems will operate in a corridor with multiple existing cables, providing opportunities for redundancy. For example, Baubau is connected to the Palapa Ring Middle, and Makassar hosts several cables, including the Indonesia Global Gateway (IGG) System and the Asia Connect Cable-1 (ACC-1). In the event of a cable break, traffic could potentially be rerouted through these alternatives, minimizing disruptions.
Repair logistics for submarine cables typically involve deploying specialized cable ships to locate and fix the damaged section. Given Indonesia's extensive archipelago, repair times may vary depending on the location and accessibility of the fault.
Bottom line
- The Indonesia Tengah Cable Systems is a planned submarine cable network spanning 2,641 km, with a ready-for-service date of 2027.
- Ownership is shared between PT Jejaring Mitra Persada and Triasmitra.
- Technical specifications, including design capacity and fiber pairs, have not been disclosed in public sources.
- The cable will connect ten landing points across central Indonesia, enhancing regional connectivity.
- Theoretical latency floor is 25.9 ms for round-trip light propagation, but real-world latency will be higher.
- Redundancy is supported by existing cables in the corridor, such as the Palapa Ring Middle and Indonesia Global Gateway (IGG) System.