Besut-Perhentian Islands: Connecting Mainland Malaysia to Island Resorts
The Besut-Perhentian Islands submarine cable is a short-distance fiber optic system linking the Malaysian mainland at
Kampung Raja with the popular tourist destinations of
Pulau Perhentian Besar and
Pulau Perhentian Kecil. Owned by Telekom Malaysia and recorded as ready for service in 2019, the cable provides essential connectivity to these islands, enabling internet access and telecommunications for residents, businesses, and visitors.
What stands out about this cable is its relatively short length of 21 km, making it a modest but important infrastructure project. Publicly available information about its design capacity, fiber pair count, and supplier is scarce, which is not unusual for smaller regional cables. This lack of detail limits deeper technical analysis but highlights the importance of transparency in the submarine cable industry.
Quick facts
| Length | 21 km |
| Ready for Service (RFS) | 2019 (GeoCables database value) |
| Owners | Telekom Malaysia |
| Status | In service |
| Design Capacity | Not disclosed |
| Fiber Pairs | Not disclosed |
| Supplier | Not disclosed |
Route
The Besut-Perhentian Islands cable spans a short distance across the South China Sea, connecting three landing points: Kampung Raja on the Malaysian mainland, and Pulau Perhentian Besar and Pulau Perhentian Kecil, two islands known for their natural beauty and tourism. Kampung Raja serves as the mainland hub for the cable, while the island landings ensure connectivity to both the larger and smaller Perhentian Islands.
This corridor is geographically straightforward, with the islands located near the mainland. The short cable length minimizes challenges such as deep-sea trenching or extensive surveying, which are common in longer submarine cable projects.
Why it was built and what it carries
The primary purpose of the Besut-Perhentian Islands cable is to provide reliable telecommunications and internet services to the Perhentian Islands. These islands are a popular destination for domestic and international tourists, and connectivity is essential for local businesses, resorts, and residents. Before the cable's deployment, connectivity may have relied on less stable or slower terrestrial wireless links.
While specific data on the cable's traffic is unavailable, it likely supports general internet usage, voice communications, and potentially data services for tourism-related businesses. Its role is regional rather than intercontinental, focusing on bridging the gap between the mainland and nearby islands.
History: what can be established
The GeoCables database records the Besut-Perhentian Islands cable as ready for service in 2019. No conflicting dates have been identified in publicly available industry sources, so this year is considered accurate. However, details about its construction timeline, commissioning process, or initial testing phase are not disclosed. The cable's operational status is listed as "in service," confirming its ongoing functionality.
Capacity and technology
The design capacity of the Besut-Perhentian Islands cable is not publicly disclosed, nor are details about its fiber pair count or supplier. Without operator documentation, it is impossible to determine its technological specifications, such as the type of optical amplifiers used (if any) or its maximum throughput. Given its short length and regional focus, it is likely designed for moderate capacity sufficient to meet local demand rather than high-capacity international traffic.
Latency: the physics
The theoretical one-way light propagation latency over the 21 km wet segment of this cable is approximately 0.1 milliseconds, with a round-trip time (RTT) floor of around 0.2 milliseconds. These values are calculated based on the speed of light in fiber, which ranges from 200,000 to 204,000 km/s. However, real-world latency will be higher due to additional factors such as signal processing, routing, and the terrestrial network segments connecting the cable to broader infrastructure.
No live measurements of latency for this cable are currently available, and any attempt to estimate real-world RTT without direct data would be speculative.
Redundancy: what happens if it breaks
If the Besut-Perhentian Islands cable were to experience a fault, redundancy options would likely depend on terrestrial wireless networks or satellite communications. Given the short distance between the islands and the mainland, wireless solutions could provide temporary connectivity, though they may not match the cable's capacity or reliability. Repairs to such a short cable are generally less complex than for longer systems, as the shallow waters and proximity to shore simplify logistics.
Bottom line
- The Besut-Perhentian Islands cable is 21 km long and connects Kampung Raja to Pulau Perhentian Besar and Pulau Perhentian Kecil.
- Owned by Telekom Malaysia, it has been recorded as ready for service since 2019.
- Design capacity, fiber pair count, and supplier details are not publicly disclosed.
- Theoretical round-trip latency over the wet segment is approximately 0.2 ms, but real-world RTT will be higher.
- Redundancy options include terrestrial wireless or satellite communications in case of faults.