Summary

• EXA has completed a 335km Milan–Zurich connection and an approximately 1,600km Paris–Vienna route.
• The additions extend corridors connecting Frankfurt, Milan, Genoa, London and Central and Southeastern Europe.
• Both routes support dark fibre, spectrum and wavelength services, offering customers additional capacity and network design options.

EXA Infrastructure has completed two major fibre routes linking Milan with Zurich and Paris with Vienna, expanding the physical network connections available to European data centres, cloud operators and telecommunications providers.

The 335km Milan–Zurich connection completes an approximately 1,050km corridor running through Frankfurt, Zurich, Milan and Genoa. The second route extends for around 1,600km between Paris and Vienna, strengthening a longer network corridor from London towards the Balkans, Turkey and the Middle East.

Both routes use low-loss G.652.D optical fibre and are available for dark fibre, spectrum and wavelength services. EXA says they provide additional capacity and routing choices for customers managing growing volumes of cloud, content and artificial intelligence traffic.

The additions also connect established European computing centres more closely with international submarine cable infrastructure, particularly around Genoa, which has become an important landing location for systems carrying traffic between Europe and other regions.

Unlike an individual data centre investment, long-distance fibre infrastructure supports many different customers and applications. Its commercial value depends on the routes available, the capacity that can be activated and whether customers can use the resulting connections to improve their network performance or resilience.

Two routes extend larger European connections

The Milan–Zurich cable completes EXA’s Frankfurt–Zurich–Milan–Genoa corridor, connecting major financial and technology centres across the Alps and into northern Italy.

EXA describes the new Alpine section as the first carrier-grade, low-loss G.652.D cable operated by a single provider across this particular corridor. That is the company’s characterisation of the route, rather than an independently established claim about all competing infrastructure in the region.

The design includes hundreds of optical fibres and modular inline amplifier sites, allowing transmission capacity to be increased as customers require additional services.

Optical signals weaken as they travel through fibre, and amplifiers are used to maintain suitable signal strength over long distances. Their placement and capabilities influence how much information can be transmitted and which optical equipment can be deployed along a route.

Modern fibre networks can support successive generations of transmission technology without replacing every cable. However, the achievable capacity still depends on fibre characteristics, amplifier performance and the equipment used at either end.

The Paris–Vienna route serves a different geographic purpose, extending connections between Western and Central Europe and providing additional opportunities to route traffic through Frankfurt.

EXA says the corridor enables new Paris–Frankfurt and Vienna–Frankfurt options while strengthening its longer network towards Southeastern Europe and beyond.

That geographic reach is relevant as data centre investment spreads across different European markets. Large computing facilities still need access to customers, cloud services, other data centres and international networks, even when they are built in locations selected primarily for electricity availability or lower operating costs.

The announcement establishes that new infrastructure has been completed, although it does not disclose traffic volumes, customer contracts or the proportion of potential capacity already in service.

Network choice extends beyond headline bandwidth

EXA offers several service models over the new infrastructure, allowing customers to make different decisions about how much of the underlying network they wish to operate.

Dark fibre gives an organisation access to unlit optical fibres on which it can deploy its own transmission equipment. That approach can provide substantial control over capacity and technology, but it also places greater engineering and operational responsibilities on the customer.

Spectrum services allow customers to use a defined portion of the available optical transmission spectrum, while wavelength services provide specified connections over equipment operated by the network supplier.

These arrangements create different combinations of flexibility, investment and long-term commitment. A large cloud provider with extensive networking expertise may choose to operate more of its own infrastructure, while another organisation may favour a managed service.

Capacity is only one element of the decision. Latency, availability, fault recovery, geographic diversity and commercial terms also influence which network is suitable for a particular workload.

EXA’s new connections create additional routing possibilities, but a second commercial route does not automatically guarantee independence from an existing one.

Customers seeking resilience need to understand the physical paths taken by cables, including whether they share ducts, crossings, equipment locations or other infrastructure that could be affected by a single incident.

They also need to consider how quickly traffic can be transferred after a disruption and whether the alternative route has sufficient spare capacity to carry it.

These requirements become more demanding as organisations operate across multiple cloud and data centre locations. A service may depend on several independent network connections, with each introducing its own operational and contractual dependencies.

AI demand changes long-term network investment

AI infrastructure is contributing to demand for high-capacity connections between computing facilities, particularly where model development, training and inference are distributed across different locations.

Moving large datasets between facilities can place sustained pressure on available bandwidth, while some applications require predictable response times and stable network performance.

The requirements are not identical across workloads. Bulk data transfers may prioritise aggregate capacity, whereas applications exchanging smaller amounts of time-sensitive information may be more affected by latency and network behaviour.

Cloud services, financial applications and conventional internet traffic also contribute to demand, making long-distance infrastructure an investment in several markets rather than AI alone.

EXA has been expanding its broader network, including the planned EXA Meridian transatlantic cable between North America and the UK. As Techopia previously reported, that system is expected to enter service in 2029.

The distinction between the projects is important. Milan–Zurich and Paris–Vienna are completed terrestrial routes, whereas EXA Meridian remains a planned international cable.

Constructing long-distance fibre infrastructure involves substantial initial expenditure, with the financial return depending on the number of customers and the services purchased over many years.

Fibre can remain useful for decades, but customers’ requirements and competing network technologies may change considerably during that period. Operators consequently have to balance investment in future capacity against the risk of constructing infrastructure before sufficient demand develops.

EXA has not disclosed the construction cost, contracted revenue or independently measured latency improvements associated with the two completed routes. Its announcement confirms their geography, technical design and available service types rather than establishing their commercial performance.

Customers can now assess whether the connections offer a useful improvement in capacity or route diversity compared with their existing arrangements. The longer-term results will depend on utilisation, service reliability and the extent to which additional traffic moves onto the new European corridors.