Subsea Cables Connecting Asia and Australia


There are the following subsea cable systems connecting Asia and Australia: 



ASC (Australia-Singapore Cable)

AJC (Australia-Japan Cable)

JGA (Japan-Guam-Australia)


OAC (Oman Australia Cable)

PNG National

Coral Sea (CS²)

Trident (pending)

The Australia-Singapore Cable (ASC) is a 4,600-km submarine cable system linking Perth, Australia and Singapore, through the Sunda Strait in Indonesia, providing the first 100Gbit/s high-speed connection from Western Australia to South East Asia.

The Australia Singapore Cable (ASC) project was launched by Nextgen Networks and Vocus jointly, based on a 50/50 joint venture. In April 2017, Vocus Communications completed the acquisition of Nextgen Networks to own 100% of the ASC. 

The ASC cable system is designed to carry 40Tbps with four fibre pairs.

The ASC cable system has been ready for service since September 2018.

ASC, Indigo and Trident cable systems enable high bandwidth and redundant routes and connectivity between Singapore and Australia.

The AJC Network (Australia Japan Cable Network) is a 12,700km submarine cable network connecting Australia, Guam and Japan, with two fiber pairs.

The AJC network was initially designed with 10 Gbps DWDM technology, with a design capacity of up to 64 waves per fibre pair over two fiber pairs. The AJC network runs through the six AJC cable landing stations, with two separate cable landing stations in each of  Japan, Australia and Guam. The AJC Network was ready for service on 30 December 2001.

The AJC network was upgraded the addition of 40G technology in mid 2012 and the addition of 100G technology in late 2013 and early 2014.  During 2018 AJC was upgraded with latest optical coherent technology to be equipped with some 5Tbps Australia-Guam-Japan. 

The Design Capacity of AJC is currently approximately 10Tbps.

The JASURAUS submarine cable system (also know as APCN Australian Extension) connects Australia (Port Hedland) with Indonesia (Jakarta), with total cable length of 2800 km and a design capacity of 5 Gbps. and brings Australia to the Asia Pacific Cable Netwoen/systems/intra-asia/apcnrk (APCN).

For more information about the JASURAUS, please refer to APCN cable system overview.

The ASSC-1 submarine cable system is a new cable connecting Australia, Indonesia and Singapore, comprises four fibre pairs and spans a distance of 4,600 km.

The ASSC-1 consists of three express fiber pairs directly linking Perth and Singpare and one omnibus fibre pair between Perth, Jakarta and Singapore.

The ASSC-1 cable system will have an initial design capacity of 6.4 Tbps, running at 40 Gbps technology, with the capability to be upgraded to 100 Gbps in the future.

The ASSC-1 cable system is scheduled to be ready for service by the end of 2013.

The INDIGO cable system is formerly named as APX-West.

In April 2017, AARNet, Google, Indosat Ooredoo, Singtel, SubPartners, and Telstra announced they have entered into an agreement with Alcatel Submarine Networks (ASN) to build the INDIGO cable system that will connect Singapore, Indonesia and Australia.

The INDIGO cable system spans 9200km, consists of two distinct cable projects, Indigo West of 4600km connecting Singapore to Perth via Jakarta, and Indigo Central of 4600km connecting Perth to Sydney.

The INDIGO cable system is designed with two fiber pairs, with a design capacity of around 36 Tbps and option to expand in the future. INDIGO cable system features new spectrum-sharing technology, each consortium member can deploy its own SLTE, upgrade their networks and enable capacity increases on demand independently.

In Australia, the INDIGO WEST lands at Floreat Beach in Perth, and the INDIGO Central lands at Coogee Beach in Sydney. The terminal equipment of INDIGO cable system is hosted at NextDC's P1, P2, S1, and S2 datacentres across Perth and Sydney.

The INDIGO cable system has been ready for service since the end of May 2019. 

Papua New Guinea is an island nation located in the South Pacific. The PNG National Submarine Cable Network is built and operated by PNG DataCo Limited, connecting 14 main cities in PNG, and with international connectivity by a link to Jayapura in Indonesia, and interconnection with PPC-1 at Madand cable landing station, onward to Guam and Sydney, Australia. 

The design capacity of the system is 8Tbps. And it is expected to be completed in 2018.

Trident Cable System is a 28 Tbps subsea cable, using 100Gbps coherent DWDM technology upgradeable to 400Gbps technology in the future, which will connect Australia, Singapore and Jakarta.

The Trident cable will have interconnection points in Equinix IBX data centres in Sydney, Melbourne, Singapore and Jakarta, as well as a landing point in Perth, providing greater connectivity for businesses, content providers and communications network providers.

The Japan-Guam-Australia (JGA) Cable System comprises JGA South and JGA North, interconnecting at a new cable landing station in Piti, Guam.

JGA South and JGA North are operated as separate cable systems. JGA South is supplied by Alcatel Submarine Networks (ASN), while JGA North is supplied by NEC Corporation.

JGA South (JGA-S) is a consortium cable. JGA South consortium includes AARNet, Google and RTI. Spanning approxiamately 7000km, the JGA South lands in Sydney, Sunshine Coast of Queensland and Piti in Guam, with an initial design capacity of 36 Tbps (2*180*100Gbps) on 2 fiber pairs. JGA South is the first new cable ever to land in Sunshine Coast of Queensland, on the east coast of Australia, outside of Sydney. In Guam, the JGA South lands at the Piti-I CLS, with Google as the landing party.

JGA North (JGA-N), the 2700km segment between the Minami-Boso in Japan and Piti in Guam, is a private cable with RTI as the sole operator and investor. The JGA North cable consists of two fiber pairs, with an initial design capacity of 24 Tbps (2*120*100Gpbs). The JGA-North lands at the GNC CLS and data center in Piti, Guam. The Minamiboso cable landing station for JGA North is a new cable landing station owned and controled by NTT, which is built as terminal station for NTT's Jupiter cable system. The Minamiboso cable landing station will provide additional geographical diversity for U.S.-Japan traffic currently landing at KDDI's Chikura cable landing station and SoftBank's Maruyama cable landing station.

According to FCC Public Notice on JGA North submarine cable licensing, RTI Solutions will be the U.S. landing party and control the Piti, Guam, cable landing station arrangements under a contract with the cable station landing owner, Gateway Network Connections, Inc. (GNC), a Guamcompany. GNC will be 51% owned by Asia Connectivity Elements Pte. Ltd.(ACE), a Singapore company, and 49% owned by Teleguam Holdings,LLC (GTA), a Guam company. ACE is owned 50 percent by Mr. Russell Matulich and 50 percent by Mr. Choo Wee Tiong, a Singapore citizen and Senior Vice President of RTI Solutions.

JGA South and JGA North were ready for service in March and July 2020 respectively. 


JGA North & JGA South
JGA North & JGA South

Coral Sea Cable System

The Coral Sea Cable System (CS²) 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 delivers a minimum of 20Tbps capacity to Papua New Guinea and Solomon Islands respectively, a total capacity of 40Tbps. This significantly augments Papua New Guinea’s existing submarine cable capacity. The Solomon Islands currently relies solely on satellite for international voice and data communications.


  • A 4,700km submarine cable system linking Sydney to Port Moresby and Honiara.
  • The Solomon Islands Domestic Network is also a 730km submarine cable system connecting Honiara to AukiNoro and Taro Islands.
  • Delivering faster, cheaper and more reliable communications infrastructure.
  • Bringing both countries significant economic and development opportunities.

The Coral Sea Cable System (CS²) is supplied and installed by Alcatel Submarine Networks (ASN), utilising ASN's 1620 SOFTNODE Submarine Line Terminal Equipment (SLTE) .

The Australian Government provides the majority funding (around two-thirds) for the Coral Sea Cable System (CS²), with PNG and Solomon Islands Governments jointly contributing up to one third of project costs. Known as the Coral Sea Cable System. The project costs approximately AU$200m (US$144.2m). 

The CS² consortium comprises Vocus Communications, Solomon Island Submarine Cable Company, PNG DataCo Limited.

Vocus Communications was selected by the Australian Government to implement the Coral Sea Cable System (CS²) project which lands at Tamarama Beach and houses the termnial equipment at the Paddington Cable Landing Station in Sydney.

The Coral Sea Cable System (CS²)  was ready for service in February 2020.


The Oman Australia Cable (OAC) is a 9800km submarine cable connecting Muscat, Oman and Perth, Australia, with additional branching units designed to extend the system into Salalah, Oman and Djibouti in the future. The OAC delivers cost-effective, reliable, low-latency and diverse connectivity between Oman and Australia. and forms part of the only path from the US to EMEA, avoiding the Sunda Strait and the South China Sea. 

The OAC cable system consists of 4 fiber pairs, designed with 135*100G DWDM and a total system capacity of 54Tbps. 

The OAC cable will land at Omantel’s Barka Cable Station which is located approximately 50 kilometres away from Oman’s international airport.

The OAC cable system is owned and invested by SUB.CO, supplied by SubCom, and is expected to commence manufacturing later this year and is scheduled to be completed by December 2021.