What each country and landing point keeps if Labuan-Brunei Submarine Cable goes down. A calculation from our cable and landing-point database, not a forecast.
Every landing point of this cable has another cable within 50 km.
No alerts from our monitoring on this cable in the last 180 days. Events feed →
Counted: other international cables landing in the same country (domestic cables between points of one country are not a way out), other cables at landing points within 50 km, and whether the country has land links. Not counted: cable capacity, operator contracts and satellite. Use as a first look at dependence, not as a statement of what would happen.
Live Performance
18
measurements
4
probes
68
days monitored
302.3
ms avg RTT
0
anomalies
Monitored from 2026-07-27 through 2026-10-03 - live ICMP round-trip time measurements via our monitoring probes. All values below are recomputed daily from raw probe data. ✓ No anomalies detected in the monitored period.
Measurement sources
Probe
Location
Samples
Avg
Min-Max
Last seen
#6410 own probe
Sao Paulo BR
6
386.2 ms
355.3-416.1
2026-10-03
own probe
Almaty KZ
6
274.8 ms
263.1-312.3
2026-10-03
#6427 own probe
Sydney AU
5
290.3 ms
182.4-398.6
2026-10-03
#6487
control probe
1
24.5 ms
24.5-24.5
2026-07-27
About the Labuan-Brunei Submarine Cable Cable System
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.
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.