Coral Sea Cable (CS2)
The international Coral Sea Cable System (CS2) will link Honiara in the Solomon Islands and Port Moresby in PNG to Sydney, Australia. CS2 comprises a 4 fibre pair cable from Australia through the Coral Sea to a Branching Unit that separate 4 pairs into separate 2 pair paths. From the Branching Unit each pair path will extend to Honiara and Port Moresby respectively where they will terminate at landing facilities and terminal equipment.
This is a powered repeated system engineered to provide a minimum of 10 Terabits/s over a single pair of fibres so each country has a potential 20 Terabit/s capacity with today’s established cable technology. Each country’s fibres are completely independent of the other right through the system and the only linkage from Port Moresby to Honiara is via the Sydney Landing Facilities.
The project also includes the Solomon Islands Domestic Cable Network (SIDN) which will link Auki, Noro and Taro back to Honiara using unpowered cable. The long stretch from Honiara to Noro requires amplification at each end to span the distance successfully so has a maximum capacity of 12 X 100GB/s or 1.2 Terabit/s. The other spans all support 10 Terabit/s maximum capacity.
Taro is selected as the 4th landing point in order to bring services to the far end of the Solomon Islands and place critical infrastructure in the best location for a future expansion of the system to Arawa in Bouganville where it would join the PNG domestic network as a useful bridge between the countries and an important diverse path in the event of serious failure on the Sydney international route. The domestic network will be managed by the Solomon Submarine Cable Company (SISSC).
The planned interchange Cable Network 2 (ICN2) will connect Honiara to Port Vila and Luganville in Vanuatu. The system will comprise a trunk (Honiara – Port Vila) and branch (Luganville) architecture, with an approximate length of 1,630 km. The trunk portion is repeated. A dual end power feed configuration adds resiliency to the design by allowing either end of the trunk to power the entire system, in case of a complete power failure at the other end.
This system has been modified from the original ICN2system proposed in 2015. The modifications to the system include adding a Cable Landing Station (CLS) in Luganville, Vanuatu and moving the Cable Landing Station in Solomon Islands to a site location to be determined.
With an expected capacity of 10 Terabits/s between the cities of Honiara and Port Vila, ICN2 will provide Solomon Islands with a high bandwidth global connection through Interchange’s ICN1 system, with onward connectivity to Fiji and the Southern Cross Cable Network (SCCN). ICN2 will be complimentary to the Coral Sea Cable and provide interconnection and redundancy services to the system in case of system outages. This redundancy should attract new investment into Solomon Islands due to the increased reliability inherent in the availability of multiple network connections.
ICN2 Cable has a Class License issued and it is anticipated that the cable will be ready for use by November 2019.