Six Routes Into Taiwan: Why the Internet Counts Paths, Not Cables

On September 28, 2026, the independent network provider RETN announced it had added a sixth subsea route serving Taiwan. The new path, between Taipei and Hong Kong, joins three other Taipei to Hong Kong routes and two Taipei to Tokyo routes the company already operated, bringing its total to six physically diverse international paths into the island. The announcement was picked up again this week by telecom publications in Asia and Europe, and the timing is instructive. RETN framed the addition as a direct response to two pressures: recurring submarine cable disruptions around Taiwan, and surging demand from data intensive workloads, above all artificial intelligence. The interesting part of the announcement is not the raw capacity. It is the counting. In submarine networking, resilience is not measured in terabits. It is measured in independent paths, and six is a meaningful number.

To understand why, you have to understand what a route is. In industry language, a route is not a cable. It is a physically independent path for traffic between two points, and independence is the operative word. Two cables that land at the same coastal station, cross the same seabed corridor, or terminate in the same data center share what engineers call a common fate. One anchor drag, one earthquake, one power failure, or one faulty software update in shared equipment can take both of them down together. That is why the design language in the RETN announcement reads like a checklist of things not to share: different landing points, different terrestrial corridors, different data centers, different equipment vendors. The routes are deliberately spread across multiple geographically separate facilities rather than concentrated in a single carrier hotel, the neutral data center where networks meet to exchange traffic. If one site has a bad day, the other five paths keep working.

Why Taiwan is the stress test

Few places on the map make the logic clearer than Taiwan. The island is served by about 25 submarine cables in total: 15 international links connecting it to Japan, South Korea, the Philippines, Singapore, and the United States, and 10 domestic cables tying the main island to outlying territories such as Penghu, Kinmen, and Matsu, according to regional analysis of the undersea infrastructure serving Taiwan. Twenty five sounds like plenty, until the faults start arriving in clusters.

They have been arriving. On January 3, 2026, the Apricot submarine cable broke roughly 47.7 kilometers off Toucheng in northeastern Taiwan, damage attributed to an earthquake that struck near the coast of Yilan on December 27, 2025. The Ministry of Digital Affairs in Taiwan tracks such incidents on a public page titled "Status of Submarine Cable Obstacles," an unusually transparent practice among regulators worldwide. In April 2026, rough weather shifted the wreckage of a ship onto a cable serving Dongyin, a strategically located island of about 1,500 people at the top of the Taiwan Strait; the ministry activated a microwave backup system to keep voice and data services running while the carrier Chunghwa Telecom prepared a repair expected to take months. In 2023, two cables connecting the Matsu islands were severed in a separate incident that left residents scrambling for connectivity. The pattern is not one disaster but a steady drumbeat, and a steady drumbeat is exactly what redundancy is built for.

What actually happens when a path dies

When a cable goes down, the first thing that moves is not a ship. It is information. The internet is a network of networks, tens of thousands of autonomous systems, and the protocol holding them together is BGP, the Border Gateway Protocol. Each network announces which destinations it can reach. When a path fails, the announcement is withdrawn, and routers around the world update their tables to send traffic around the gap. Nobody reboots the internet. The system heals by gossip, propagating the bad news until every router has found a new way through.

But healing is not the same as being whole. The RETN announcement makes a point that network engineers repeat like a mantra: a single fault is usually manageable, while several faults within the same corridor are what hurt. Backup paths are longer, or shared with more users, or both. Traffic that once rode a direct route now competes for space on the survivors, and the result is congestion, higher latency, and lost packets. That is the difference between spare capacity and spare paths. Capacity absorbs a bad day. Paths absorb a bad month.

The internet does not survive cable cuts because it is unbreakable. It survives because somebody paid for a second, third, and sixth way in.

Why the sixth route is about AI as much as earthquakes

The second half of the RETN rationale is newer. The company says demand for international capacity from data intensive workloads, particularly AI, is growing, and that customers are asking for diversity rather than just more bandwidth. That is a subtle shift. For a decade, the selling point of a new cable was almost always capacity: more terabits, a lower cost per bit. Now the pitch is insurance. AI training and inference workloads are unusually sensitive to unstable or high latency international links, and Taiwan, home to the most advanced chip manufacturing on the planet, is becoming a place where enormous amounts of data need to move reliably across borders. Oswald Huang, RETN Managing Director for the Taiwan market, said the company plans to interconnect with more local data centers in support of the Smart Technology Island vision for Taiwan, a sign that the sixth route is as much about where compute lives as where cables land.

Resilience is a design choice

There is a temptation to treat stories like this as pure infrastructure news, remote from daily life. The better reading is that they describe the mechanism behind the reliability most of us take for granted. Every country has its chokepoints. The Red Sea corridor, for example, carries an estimated 17 percent of global internet traffic, which is why cuts to the SMW4 and IMEWE systems near Jeddah in September 2025 degraded connectivity from South Asia to parts of Africa. The Philippines lost roughly 300 gigabits of international capacity in a single October 2026 cable cut and kept most of its internet working by shifting traffic onto alternate paths. Each of these episodes is the same lesson in different clothing: the internet looks like magic only because someone, somewhere, paid for redundancy before it was needed. Six routes into Taiwan is what that looks like when you write it down.