SubCo announces three Indo-Pacific cables totaling more than 40,000km

SubCo's announcement came in threes. The Australian digital infrastructure firm said last week that it will build APX North, APX East-2 and APX West, an Indo-Pacific subsea program it sizes at more than 40,000km of fiber, with all three systems due live in 2029 and full details of their landing points not yet shared.

Each route answers a different question of geography. APX North runs 9,500km from Sydney to Japan by way of Guam, and SubCo says it will use switched branching units so that selected fiber pairs can bypass Guam entirely. APX East-2 is the long trans-Pacific leg, 10,000km from Guam to Los Angeles. APX West, the shortest at 4,600km, connects Perth to Singapore with branches into Jakarta and Batam. All three systems are specified at 24 fiber pairs, so distance and destination are the differences among them rather than capacity.

Read as a set, the program reaches into three corridors at once: Australia to Japan, Guam to the US mainland, and Australia to Singapore with extensions into Indonesia. The systems already serving those markets were built the other way round, one at a time and each with its own backers, as the coverage's own comparison set shows. SubCo's announcement names no carrier partners for any of the three, and no consortium behind them.

The Australia-Japan corridor is where the incumbent's shape explains the challenger's design. The Australia-Japan Cable is the only cable linking the two countries directly, and it has branches to Guam. It arrived in 2001 as a consortium project backed by AT&T, NTT, SoftBank, Telstra and Verizon, five carriers pooling demand for a line every one of them needed. APX North's switched branching units give a buyer something the corridor has not offered: a way to reach Japan from Sydney with selected fiber pairs skipping Guam. The announcement does not say why a customer would want to skip it, whether for redundancy, latency or landing economics; it says the option exists, and the option is the part of APX North the coverage describes in mechanical detail.

The reason the bypass is worth a design decision is Guam itself. The US territory is a major cable landing point in the Pacific, with some 18 live and planned cables landing there that link the United States, Australia, Japan and Southeast Asia. A system that touches Guam joins that concentration and inherits its reach. A system whose selected pairs can avoid the island offers a path around the busiest node on the northern routes, and a bypass does not open a market Guam does not already serve: the island's cables reach the same four markets the APX program does. What the bypass buys is the routing, not the reach. Those are two different things for two different customers, and SubCo has built both options into one cable.

APX East-2, the Guam-to-Los Angeles leg, is the system with the least stated competition. The coverage names no other cable serving that pair, which leaves the trans-Pacific crossing as the route where SubCo's case rests most directly on the traffic Slattery describes. He framed the segment as the backbone for trans-Pacific traffic between Asia and the US, with APX North providing diverse connectivity for Australia and Japan to it, and said SubCo expects the system “to be incredibly popular.”

Perth to Singapore is the busiest of the three pairs, and APX West arrives into it with company. Vocus' Australia-Singapore Cable has linked the two cities since 2018, and the Inigo-West consortium cable has since 2019, both of them predating the AI traffic SubCo cites as its reason for building. The differentiation SubCo is selling sits at the ends rather than along the route: branches into Jakarta and Batam, which the coverage does not describe either existing system as having.

The Batam branch is the one with a number behind it. The Indonesian island sits close to Singapore and hosts more than 20 cables live or in development, but only one of them, BW Digital's upcoming Hawaiki Nui 1 system, is due to connect directly to Australia. A SubCo branch would make a second. Where on Batam it would land, and when it would be built, the coverage does not say.

The headline distance and the parts of it do not reconcile in the published account. The three spans SubCo names add to 24,100km: 9,500 for APX North, 10,000 for APX East-2 and 4,600 for APX West. The program total the company states is more than 40,000km. Branch segments, landing approaches or elements the report does not itemize could account for the difference, and the coverage does not reconcile it. The figure doing the framing is the larger one, and it is also the only scale number in the announcement: no cost is attached to any of the three systems, and no financing structure is described.

What is attached is a date. All three systems are due live in 2029, which is when the fiber pairs can begin carrying revenue; the time between the announcement and service is construction, permitting and contracting, spread across routes that touch four countries. Whether the money comes from capacity sold forward, from SubCo's own capital, or from a partner the announcement has not named is not in the coverage. The 2001 consortium that built the Australia-Japan Cable had its users signed up as owners before construction began; SubCo's three systems have no equivalent on the record.

The program's own comparison set leans the same way. The Australia-Japan Cable, the Inigo-West cable and Hawaiki Nui 1 are all consortium or multi-party projects in the coverage's telling. SubCo is putting three systems under its own name, which makes the question of who carries construction risk, the firm, a lender or a customer paying ahead of service, the one the announcement leaves open.

Slattery, SubCo's founder and co-CEO, supplied the demand case. “I know it's ambitious, but it's achievable, and it's necessary,” he said. “People have been slow to understand that AI factories are dead without massive subsea connectivity to carry tokens from factory to customers.”

He made the western case in the same register: “Singapore and Indonesia remain critical to Asia's connectivity landscape, and their strategic importance will only grow as bandwidth demand accelerates, and new interconnection hubs are needed to deliver greater flexibility and route diversity. We are building as much of that as possible into our system design and making that available to our cornerstone customers through APX West.”

Cornerstone customers is the phrase, and the announcement names none of them. Nor does it name landing points beyond the cities at each end of the three routes and the branches on APX West. What the record holds is a route map, a fiber count of 24 pairs per system, a distance figure, and a service date in 2029. The part a buyer or a lender would want first, who has committed, on what term, and at what price, is the part that is missing.

All three systems are due live in 2029. The landing points, when they are published, will show which of the branches and bypasses are built as described, and a capacity agreement will show whether anyone is paying for the fiber ahead of time. Either document would say more about the program than anything published so far.