Fiber optic cable cut in Papua New Guinea

Papua New Guinea relies heavily on the Coral Sea Cable System for international internet connectivity, and any cut can significantly disrupt communications and increase latency.

Coral Sea Cable System Overview

Papua New Guinea's primary international internet connection is the Coral Sea Cable System (CS2), a 4,700 km submarine fiber optic cable linking Port Moresby to Sydney, Australia, with a branch to the Solomon Islands. The system has a total capacity of 40 terabits per second, with each country able to access up to 20 terabits/sec if fully expanded. The cable uses Dense Wavelength Division Multiplexing (DWDM) and repeated 100G technology, ensuring high-speed, reliable connectivity.

The CS2 also includes the Solomon Islands Domestic Network (SIDN), connecting provincial centers via submarine links. Impact of a Cable CutA fiber optic cable cut in PNG would typically result in: Reduced international bandwidth: Internet speeds may drop, and large data transfers could be delayed. Increased latency: Traffic may be rerouted through alternative, often slower, satellite or regional networks.

Service disruptions: Businesses, government services, and educational institutions relying on stable internet may experience outages. Repair timelines: Submarine cable repairs can take days to weeks, depending on the location of the cut, availability of repair ships, and weather conditions, similar to incidents in other regions like the Red Sea.

Local Fiber Infrastructure

In addition to the CS2, PNG has domestic fiber networks supported by providers like Cetelnet, which supply single-mode and multi-mode fiber for urban and remote areas. These networks help maintain local connectivity but cannot fully compensate for international outages.

Mitigation and Alternatives

During a cable cut, operators may: Reroute traffic through satellite links or regional networks, though this increases latency. Prioritize critical services such as government communications and emergency services. Accelerate repair operations using specialized cable repair ships and splicing equipment.

Conclusion

The Coral Sea Cable System is vital for PNG's internet connectivity, and any disruption can have widespread effects on communication, commerce, and public services. While local fiber networks provide some resilience, international connectivity remains dependent on the submarine cable, making timely repairs and contingency planning essential for minimizing impact.