Cabling projects support AI infrastructure in hyperscale data centres
Rosenberger Optical Solutions & Infrastructure implements large-scale AI data centre cabling projects across Europe in cooperation with a leading AI computing provider and end customer Microsoft.
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Rosenberger Optical Solutions & Infrastructure (Rosenberger OSI) has completed seven large-scale cabling projects to support AI infrastructure deployments in hyperscale data centres across Europe. The projects involved the rapid installation of high-performance fibre optic cabling for AI computing clusters at multiple locations, each delivered within strict time and quality constraints.
Context of the cooperation
The rapid expansion of AI workloads is driving demand for dense, high-bandwidth, and low-latency data centre infrastructures. To meet these requirements, hyperscale operators rely on scalable cabling systems that can be deployed quickly without compromising reliability or validation standards.
Rosenberger OSI was selected to execute the cabling scope for a leading AI computing provider, with Microsoft acting as the end customer for acceptance and validation. The cooperation required precise coordination across several European countries, each with different site conditions and operational constraints.
Technical scope and responsibilities
The projects covered the installation of between 2,500 and 10,200 Active Optical Cables (AOCs) per site, connecting core switches, access switches, and server racks. Installations were completed in data centres located in Paris (two sites), Warsaw, Milan, Madrid, Bergamo, and Zurich.
Rosenberger OSI was responsible for project planning, logistics, on-site execution, and coordination of installation teams. Each site was supported by a dedicated team consisting of two technicians and a project manager, who supervised installation activities through to final handover.
Deployment under time constraints
Each location was subject to a maximum installation window of ten days to avoid delays in the customer’s AI infrastructure rollout. To meet these deadlines, Rosenberger OSI implemented a multi-shift working model with up to three shifts per day, enabling continuous progress despite site-specific constraints such as hardware placement, acceptance criteria, and local regulations.
Following installation, a structured validation phase of up to five days was conducted. Testing was performed jointly with Microsoft and an independent third-party provider, using automated tools to generate detailed error and performance reports.
Results and validation outcomes
All seven projects were completed within the defined ten-day installation window, with no delays attributed to cabling activities. Post-installation validation confirmed reliable operation of all installed cables and ports, with fault tolerance remaining within the 1.0 percentile across all sites.
Project dimensions varied by location, ranging from 60 to 192 racks and from 4,320 to 14,336 installed cables. On-site teams included up to 40 data centre engineers, supported by shift supervisors and dedicated handover management. Daily progress reports ensured transparency and continuous alignment with the customer.
Impact on AI data centre deployment
The successful execution demonstrates how structured planning, standardized installation processes, and close cooperation between infrastructure providers, operators, and validation partners can support fast and reliable deployment of AI-ready data centres. As AI and cloud workloads continue to scale, such coordinated approaches are becoming a critical factor in delivering high-performance, resilient data centre infrastructures on tight timelines.
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