Labuan-Brunei Submarine Cable: A Short Cross-Border Link
The Labuan-Brunei Submarine Cable is a relatively short underwater telecommunications cable connecting Malaysia and Brunei. Spanning just 52 kilometers, it links the landing points of
Kiamsam in Malaysia and
Tungku in Brunei. Owned by Common Tower Technologies Sdn Bhd, the cable is listed as in service, with a recorded ready-for-service (RFS) year of 2017 in the GeoCables database.
What makes this cable noteworthy is its role in facilitating connectivity between two neighboring countries in Southeast Asia. However, several technical details about the cable remain undisclosed, including its design capacity, fiber pair count, supplier, and underlying technology. This lack of publicly available information limits a deeper technical understanding of the cable's specifications and performance.
Quick facts
| Cable name | Labuan-Brunei Submarine Cable |
| Length | 52 km |
| Ready-for-service year | 2017 (GeoCables database value) |
| Owner | Common Tower Technologies Sdn Bhd |
| Status | In service |
| Design capacity | Not disclosed |
| Fiber pairs | Not disclosed |
| Supplier | Not disclosed |
| Technology | Not disclosed |
| Landing points | Kiamsam (Malaysia); Tungku (Brunei) |
| Other cables at Tungku | Asia-America Gateway (AAG) Cable System, Asia Link Cable (ALC) |
Route
The Labuan-Brunei Submarine Cable traverses the South China Sea, connecting Kiamsam in Labuan, Malaysia, to Tungku in Brunei. Labuan is an island off the coast of Malaysian Borneo, known for its role as an offshore financial center. Tungku, located on the northern coast of Brunei, serves as a landing site for multiple submarine cables, including the Asia-America Gateway (AAG) Cable System and the Asia Link Cable (ALC). This geographical proximity to other cables provides Brunei with diverse connectivity options.
Why it was built and what it carries
The primary purpose of the Labuan-Brunei Submarine Cable is to enhance telecommunications between Malaysia and Brunei. As a short regional link, it likely supports internet traffic, voice communications, and other data services between the two countries. While specific details about its capacity and traffic are not publicly disclosed, the cable contributes to cross-border connectivity in a region where reliable infrastructure is essential for economic and social activities.
History: what can be established
The GeoCables database records the cable's ready-for-service year as 2017. Publicly available industry sources do not appear to contradict this date, and no alternative RFS year has been identified. The cable was developed and is operated by Common Tower Technologies Sdn Bhd, a Malaysian company specializing in telecommunications infrastructure.
Capacity and technology
The design capacity of the Labuan-Brunei Submarine Cable is not disclosed in public records, nor is information about its fiber pair count, supplier, or specific technology. Without documentation from the operator or other reliable sources, attributing these characteristics would be speculative. It is common for regional cables of this length to have modest capacity compared to transoceanic systems, but this cannot be confirmed for this cable.
Latency: the physics
Theoretical one-way light propagation over the 52-kilometer wet segment of the cable is approximately 0.3 milliseconds, assuming light travels through fiber at speeds between 200,000 and 204,000 kilometers per second. The theoretical round-trip time (RTT) floor for the wet segment is approximately 0.5 milliseconds. However, real-world latency is higher due to additional factors such as land-based network tails, terminal equipment delays, and routing inefficiencies. No live measurements are currently available for this cable, and any precise RTT values would depend on the broader network configuration.
Redundancy: what happens if it breaks
In the event of a failure of the Labuan-Brunei Submarine Cable, Brunei's connectivity could rely on alternative cables landing at Tungku, such as the Asia-America Gateway (AAG) Cable System and the Asia Link Cable (ALC). These cables provide international links and could reroute traffic away from the Labuan-Brunei connection. Repairing a cable of this length typically involves deploying specialized cable-laying and repair vessels, which locate the fault, retrieve the damaged section, and replace or splice the cable. Such operations are standard practice in the submarine cable industry.
Bottom line
- The Labuan-Brunei Submarine Cable is a 52-kilometer link between Malaysia and Brunei, with landing points at Kiamsam and Tungku.
- Owned by Common Tower Technologies Sdn Bhd, it has been listed as in service since 2017.
- Key technical details, such as design capacity, fiber pairs, supplier, and technology, are not publicly disclosed.
- Theoretical latency over the wet segment is approximately 0.3 ms one-way, but real-world RTT is higher.
- Redundancy for Brunei is supported by other cables landing at Tungku, including the AAG and ALC systems.