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Digital Realty's First Turnkey Cable Landing Station Shows Where Subsea Meets the AI Data Center

For most of the history of the internet, the path a subsea cable takes from the ocean floor to a customer's server has been a chain of handoffs. A cable ship drops the fiber on a beach. A consortium owns a landing…

Cloud & Edge Computing 1,962 words 9 min read By News Jualin

Digital Realty's First Turnkey Cable Landing Station Shows Where Subsea Meets the AI Data Center — Cloud & Edge Computing No Image Cloud & Edge Computing
Lead image · Filed 3 October 2026, 05:43

Digital Realty's First Turnkey Cable Landing Station Shows Where Subsea Meets the AI Data Center

Introduction

For most of the history of the internet, the path a subsea cable takes from the ocean floor to a customer's server has been a chain of handoffs. A cable ship drops the fiber on a beach. A consortium owns a landing station in a windowless building near the shoreline. From there the traffic passes to a backbone operator, then to a metro fiber provider, then to an internet exchange, and only then does it reach the data center where a cluster of GPUs or a block storage array is actually waiting for it. Every one of those handoffs is a queue, a contract, and a piece of latency that nobody sells but everybody pays for.

Digital Realty is now trying to collapse that chain. On September 22, the colocation and interconnection operator announced it would build a cable landing station inside its LAX12 data center in El Segundo, California, in partnership with subsea infrastructure specialist Assured Communications. The project, according to the company's own description of the work, is its first turnkey cable landing solution, and it is expected to begin supporting cables in 2028. It is aimed squarely at the routes that carry traffic between Asia-Pacific and North America.

The timing is the interesting part. This is not a story about a shortage of bandwidth in the abstract sense. It is a story about what happens to the physical layer when the biggest buyers of international capacity are no longer enterprises shopping for a dedicated circuit but machine training runs and inference fleets that want the whole ocean-crossing path handed to them as one product. For readers tracking cloud and edge infrastructure, the LAX12 project is a fairly precise signal about where the next round of buildout money is going: not into another megawatt of GPU capacity, but into the boring, expensive, hard-to-permit connective tissue between the seabed and the rack.

Inside LAX12: Turning a Beach Landing Into a Data Center Amenity

A cable landing station is where a subsea cable comes ashore and connects to terrestrial networks. That definition has not changed in a century. What has changed is who wants control of the building, and what they want to do once the cable reaches it.

Digital Realty's LAX12 sits in El Segundo, a few miles south of Los Angeles International Airport in a town that has become one of the densest data center clusters in the world. According to Craig Waldrop, Digital Realty's vice president of strategy and business development, the geography of that specific site is a large part of why it works. El Segundo's beach landing is close to Digital Realty's existing infrastructure, which shortens the terrestrial hop between where the cable comes out of the water and where the capacity can be handed to a carrier or a cloud region.

That proximity is the whole argument, and it is an argument about topology rather than about marketing. In the traditional model, a subsea cable coming ashore in Southern California terminates in a facility that then has to reach out across the metro to find capacity. Every additional mile of terrestrial fiber between the beach and the data center is a mile someone else maintains, someone else charges for, and someone else can have an outage. Building the landing station inside the data center removes that segment from the equation.

As Waldrop put it in an interview with Data Center Knowledge, the project "creates a more direct bridge between subsea capacity arriving from Asia-Pacific and the broader digital ecosystem in Los Angeles." Digital Realty is describing this as an evolution of its interconnection platform rather than a one-off construction project, which suggests it is a template the company intends to repeat. If LAX12 works as a commercial model, the interesting follow-up question is how many other coastal metros have the combination of subsea cable density and colocation supply to support the same approach. Miami, Marseille, Singapore and Fortaleza are all plausible candidates for the same treatment.

What Turnkey Actually Means for Cable Owners

The word carrying the most weight in the announcement is "turnkey." Assured Communications is supporting the design, engineering and construction, drawing on its experience with subsea cable systems and the landing infrastructure that serves them. The pitch to cable owners, as described by Digital Realty, is a single solution that covers landing and powering the system rather than a set of negotiated arrangements with a landlord and a utility.

This matters because the historically painful part of building a landing station is not the fiber. It is everything around the fiber. Cable owners need beach access, they need a secure building near the landing point, they need power contracted years ahead of the cable's ready-for-service date, and they need the terrestrial connectivity to move traffic away from the landing point toward customers who are somewhere else entirely. Each of those is a separate negotiation with a separate counterparty and a separate schedule.

Consolidating them into one facility changes who bears the schedule risk. Waldrop described the benefit as giving cable owners "increased flexibility in how they distribute capacity once it reaches the US," and that is the crux. A cable owner that lands in a carrier-neutral environment inside a data center can point capacity at whichever cloud, exchange or enterprise customer needs it without renegotiating the building first.

Assured is also a strategic partner to the landing operator for AWS's Sta'O'Nuk cable, which is worth noting for a reason that goes beyond the LAX12 project itself. The same specialist that is engineering Digital Realty's first turnkey landing is already working on a named hyperscaler route. Cable owners do not generally use one engineering firm for a hyperscaler project and a different one for a neutral commercial landing station. That overlap is a reasonable signal about where the industry sees the demand going.

The Carrier-Neutral Argument

Digital Realty has leaned hard into the carrier-neutral positioning of this project, and the explanation it gives is worth taking seriously rather than repeating at face value. A carrier-neutral landing environment, in this framing, gives cable operators a common landing point that is not tied to a single network or cloud provider.

That neutrality is commercially meaningful at a time when the alternative is an awkward negotiation. If the only landing options in a metro are facilities owned by a single carrier, the cable owner is negotiating from a structurally weak position, and the tenant connectivity available on the other end is limited to whatever that one carrier chooses to resell. A neutral facility is not just about ownership labels. It is about having more than one buyer available for the capacity you land and more than one route out for the traffic you take in.

The same neutrality logic explains why the timing is right now. The last decade of data center construction has concentrated enormous amounts of capacity in the hands of a small number of very large buyers. When your biggest customers are a handful of hyperscalers and the biggest AI workloads belong to a few dozen companies, a facility that serves everyone has real value precisely because it is not serving one of them. Digital Realty's LAX12 is a bet that neutral infrastructure still matters in a market that has been consolidating toward the largest buyers.

Why Subsea, and Why Now

Asked what is driving subsea investment, Waldrop was careful not to give a single-cause answer, and the caution is probably wise. AI is a driver, he said, but "this extends beyond any single workload." Cloud adoption, content delivery, network expansion and general digital infrastructure growth are all contributing to continued investment in subsea connectivity, alongside greater capacity and route diversity.

The AI framing is obvious but incomplete. AI workloads concentrate traffic in a way that is unusually demanding on international paths: large model training runs pull enormous volumes of data across oceans, and inference at scale is sensitive to latency in ways that a web page is not. But AI is riding on a wave that would be substantial without it. The honest read is that subsea capacity demand is growing for structural reasons, and AI has raised the urgency without creating the trend.

Route diversity deserves particular attention, because it is the part of the investment case that does not scale with demand. More capacity on existing routes improves performance. Additional capacity on additional routes improves resilience, and resilience is what an operator pays for when a single cut or a single landing point carries traffic that cannot be rerouted easily. That is a structural argument for building landing infrastructure, and it is an argument that holds regardless of which workload is generating the traffic. It is also, notably, an argument that favors a neutral facility with multiple terrestrial egress options over a single-carrier landing.

What to Watch

If the LAX12 model proves out, several things become worth tracking. First is whether 2028 holds as a ready-for-service date for the first cables, since the announcement describes the station as expected to begin supporting cables in 2028 rather than being complete. Second is whether Digital Realty repeats the format, which would turn a single project into a platform strategy, and Waldrop's description of it as an evolution of the interconnection platform suggests that is the intent. Third is which operators actually land there, because the carrier-neutral argument only holds if more than one cable system uses it.

The larger question is whether the general pattern holds: whether subsea capacity continues to migrate toward direct data center termination, and whether colocation providers end up owning more of the ocean-facing infrastructure than the historical model assumed. The buildout of AI capacity has made the value of low-latency, high-capacity paths unusually legible to buyers who previously treated international bandwidth as a commodity line item. When the customer is willing to pay for the whole path, someone has to be willing to build the whole path.

Conclusion

Digital Realty's LAX12 cable landing station is a modest-looking project with an unusually large implication. It is a windowless industrial building in a dense data center cluster, and nothing about it suggests a change in how traffic moves. What it changes is ownership of the connective layer between the seabed and the rack.

The old model fragmented that layer across beach vaults, landing stations, backbone operators, metro fiber and exchanges, and every fragment was someone else's problem. The new model, which LAX12 is an early expression of, tries to make the whole path a single commercial object. Whether that works depends on execution, on neutrality holding up when the biggest customers want exclusivity, and on whether the terrestrial side genuinely delivers the flexibility that the landing station promises. But the direction is clear, and the fact that a company with a hundred data centers chose to build its first one at the ocean's edge is the most telling detail of all.

For anyone building cloud and edge capacity, the practical takeaway is that interconnection is no longer a facility feature to be sourced after the compute is placed. It is becoming a primary design decision, and it is being priced like one.

Images

KDDI Chikura Cable Landing Station, a fenced utility compound with equipment buildings and cable conduits

ACE Duynefontein cable landing station in South Africa, a secured industrial facility beside rail infrastructure

References