About the Project

The Coral Sea Cable System is a 4,700km long fibre optic submarine cable system linking Sydney, Australia, to Port Moresby, Papua New Guinea and Honiara, Solomon Islands. The project also includes a 730km submarine cable system connecting Honiara to Auki (Malaita Island), Noro (New Georgia Island) and Taro Island.

The four fibre-pair international system will deliver a minimum of 20Tbps capacity to Papua New Guinea and Solomon Islands respectively, a total capacity of 40Tbps. This will significantly augment Papua New Guinea’s existing submarine cable capacity. The Solomon Islands currently relies solely on satellite for international voice and data communications.

The Coral Sea Cable System will deliver faster, cheaper and more reliable communications infrastructure, affording both countries significant economic and development benefits.

Australia will provide the majority funding for this cable, with PNG and Solomon Islands Governments jointly contributing up to one third of project costs.

Once complete, PNG and Solomon Islands will majority own the international cable and receive all revenue generated. Solomon Islands will also own its domestic cable and all revenue generated.

World Bank research estimates that improved internet access and connectivity could translate into additional GDP of more than USD5 billion and close to 300,000 additional jobs in the Pacific by 2040.

Cable Map


Cable System Details

The Coral Sea Cable System is based on repeated 100G technology using Dense Wavelength Division Multiplexing (DWDM) in the 1550nm window.

Cable Build

The cable system will be supplied and installed by Alcatel Submarine Networks (ASN) and will include:

  • Submarine cable featuring strong protection against external aggression via a steel vault structure and armoured protection
  • High performance fibre with large core area
  • Highly reliable repeaters designed for wide-band WDM applications.

Terminal Equipment

CS² will utilise ASN's proven 1620 SOFTNODE Submarine Line Terminal Equipment (SLTE) providing:

  • High traffic availability through redundancy of key components
  • Large capacity and compact size
  • High performance 100Gb/s advanced coherent line interfaces
  • Software configurable client interfaces supporting various services.

Other Details

The CS² system will also use:

  • Highly reliable and duplicated DC power feeding equipment with single end feeding capability
  • State-of-the-art Submarine Network management accessible from all terminal stations and the Network Operations Centre for preventive and corrective maintenance, including wet plant fault localisation
  • A robust Data Communication Network (DCN) featuring protection against wavelength failure and cable break.
The Ile de Bréhat Cable Ship
The Ile de Bréhat Cable Laying Ship

The Project Team

Pablo Kang
Pablo Kang Assistant Secretary - Pacific Infrastructure Branch Department of Foreign Affairs and Trade
Paul Komboi
Paul Komboi Managing Director PNG DataCo Limited
Keir Preedy
Keir Preedy Chief Executive Officer Solomon Islands Submarine Cable Company
Peter Harrison
Peter Harrison Project Director Vocus Communications
Simon Harriss
Simon Harriss Program Manager Vocus Communications
Mathew Shields
Mathew Shields Technical Lead/Director Vocus Communications