Summary
- Telxius is deploying Nokia ICE-X 800G coherent pluggable optics across terrestrial transport networks in Europe, the US, and Latin America.
- The rollout uses an IP-over-DWDM architecture intended to increase capacity while reducing separate equipment and space requirements.
- The deployment follows an earlier 800G demonstration on Telxius’s BRUSA subsea system.
Telxius is deploying Nokia 800G coherent pluggable optics across terrestrial transport networks including Europe, increasing the capacity available for cloud, AI, and data centre traffic while reducing the amount of separate optical equipment required in parts of the network.
The deployment uses Nokia ICE-X coherent technology within an IP-over-DWDM architecture across Telxius networks in Europe, the United States, and Latin America. It follows an earlier 800G transmission demonstration by the two companies over the BRUSA subsea cable.
Nokia and Telxius say the architecture will reduce power consumption, use less space, and lower the cost of network expansion. They have not published quantified power savings for the production rollout, so those efficiency benefits remain company claims rather than independently measured results from the deployed network.
The change reflects the continued integration of optical transport functions into router and switching platforms. Coherent pluggable modules can place high-capacity optical transmission closer to the IP layer, reducing the need for some of the dedicated shelves and interfaces used in traditional network designs.
For data centres, that equipment sits outside the server hall but forms part of the infrastructure needed to link facilities at scale. Distributed AI and cloud systems increasingly depend on high-capacity metro and long-haul networks connecting compute, storage, and users across multiple locations.
Reducing layers in the transport network
Conventional long-haul networks frequently separate routing and optical transport into distinct systems. Traffic moves from routers into dedicated optical equipment before being transmitted across fibre, creating additional equipment, connections, power demand, and physical footprint.
Coherent pluggables can remove some of those intermediate layers by inserting optical transmission capability directly into compatible network platforms. The practical result can be a simpler architecture with fewer separate components at network locations.
The benefit is not identical on every route. Fibre condition, distance, resilience requirements, operational practices, and the need for optical amplification or regeneration all influence whether an IP-over-DWDM architecture is appropriate.
An 800G optical channel also should not be confused with an 800Gbps customer service. The figure describes the capacity of the transmission channel, which a carrier can use to support multiple underlying services or large wholesale connections.
For Telxius, the deployment provides a way to increase the traffic carried across existing terrestrial fibre while limiting the growth in rack space and power required at network sites. That becomes more valuable as interface speeds increase and carriers have to scale capacity without continually expanding the physical footprint of every node.
Fibre has to match the compute map
European data centre capacity is moving beyond established hubs as operators pursue markets with more accessible power and land. That shift creates a corresponding connectivity requirement because new facilities still need low-latency routes into established cloud regions, exchange points, enterprise networks, and other data centres.
AI infrastructure adds another pressure. Large GPU environments generate substantial east-west traffic between compute and storage systems, while distributed inference and cloud services require capacity between regional facilities and users.
Increasing the transmission capacity of existing fibre can help network operators respond faster than building an entirely new long-haul route. It does not replace the need for physical diversity, however. A network with high bandwidth can still be exposed if too much traffic ultimately shares the same ducts, routes, or buildings.
Capacity and resilience therefore have to develop together. Coherent optics make more efficient use of fibre that already exists, while new routes and cables provide the physical alternatives required when faults or congestion affect one path.
Telxius’s deployment is one part of that wider infrastructure adjustment. The immediate engineering change happens in the optical transport layer, but the demand comes from the same expansion of compute that is pushing data centre developers to secure more power, cooling, land, and interconnection capacity across Europe.
