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Connecting Japan to Guam and Australia PDF Print E-mail
Tuesday, 10 April 2018 08:07


A subsea fiber consortium has begun construction of a new subsea cable linking Japan, Australia and the US territory of Guam.

The Japan-Guam-Australia Cable System (JGA) is being built by a consortium consisting of RTI Connectivity, Australia's Academic and Research Network (AARNet) and Google. It is being supplied by Alcatel Submarine Networks and NEC.
The 9,500km subsea cable system will have a design capacity of over 36Tbps. It is expected to be ready for service in the fourth quarter of next year.

At Guam, the JGA will interconnect to the SEA-US cable, which is operated by a consortium that includes RTI Connectivity, as well as the upcoming HK-G Hong Kong-Guam. Sea-US was completed in 2017.
The JGA will contribute to the expansion of communications networks from Japan and Australia to Asia and the US and expand onboard connectivity options in Guam.
The cable is being built in two sections also linking in Guam, with JGA South being funded by AARNet, Google and RTI Connectivity, while JGA North will be wholly-owned by RTI Connectivity. RTI-C's investment in JGA will be built utilizing capital from the Fund Corporation for the Overseas Development of Japan's ICT and Postal Services Inc. (Japan ICT Fund), along with syndicated loans from Japanese financial institutions, including NEC Capital Solutions Limited.
JGA is being co-built by Alcatel Submarine (ASN) and NEC. JGA South (JGA-S), the segment between Sydney, Australia and Piti, Guam, is a consortium cable including AARNet, Google and RTI-C. JGA North (JGA-N), the segment between the Minami-Boso, Japan and Piti, Guam, is a private cable with RTI-C as the sole purchaser. Both JGA-N and JGA-S will interconnect in Guam at GTA's newly built landing station.

Philippe Piron, ASN's President said, "We are proud to work with RTI, AARNet and Google on the JGA project, which will build on ASN's state-of the art technology to further provide high-capacity connectivity in the Asia-Pacific region and the reinforcement of our local presence. This new system adds to the recent successes ASN has achieved in the region and demonstrates our commitment in supporting operators and content providers to cope with their end-user’s requirements."

Hyperscale cloud providers and enterprise companies are fueling exponential data-growth between Asia, Australia, and the United States. These customers require alternative paths, enhanced quality of service, and cost-effective bandwidth solutions.

Hong Kong -Guam System

The 3,900 km Hong Kong Guam Cable System (HK-G) is scheduled to begin operation in January 2020, featuring 100 gigabits per second (Gbps) optical transmission capabilities that deliver a total capacity of more than 48 terabits per second (Tbps). This contract will partially utilize capital from the Fund Corporation for the Overseas Development of Japan's ICT and Postal Services (Japan ICT Fund).

The HK-G is slated to connect in Guam with the SEA-US optical submarine cable system that directly connects Southeast Asia to the United States, and that NEC began constructing in March 2015. As a result, this project contributes to the expansion of communications networks between China, Hong Kong and the United States, in addition to those between Southeast Asia and the United States. Moreover, the HK-G will complement other regional submarine cables, thereby increasing network redundancy and helping to ensure high capacity, highly reliable communications.

"NEC is delighted to be selected as the supplier of the HK-G Submarine Cable planned by RTI Connectivity," said Mr. Toru Kawauchi, General Manager of NEC's Submarine Network Division. "With Guam becoming a new hub in the Pacific, we look forward to helping the RTI group of companies provide for the expanding Asia-Pacific demand for more connectivity."

Google Continues Fiber Expansion

Google will commission three new subsea cables in 2019 to support its Google Cloud customers.

The company plans to co-commission the Hong Kong-Guam (HK-G) cable system as part of a consortium. The HK-G will be an extension of the SEA-US cable system and will have a design capacity of more than 48Tbps. It is being built by RTI-C and NEC.

Google said that together with Indigo and other cable systems, HK-G will create multiple scalable, diverse paths to Australia.

In addition, Google plans to commission Curie, a private cable connecting Chile to Los Angeles and Hvfrue, a consortium cable connecting the US to Denmark and Ireland.


Google had direct investment in 11 cables, including those planned or under construction. That number goes to 12 cables with the addition of the JGA-S. The three cables highlighted above are the ones referenced above.