Single source of services and cabling solutions for colocators

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KritisV l What does the German KRITIS regulation mean for data centers and server rooms?

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Consulting Services for data centers & technical building infrastructures

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Managed Services

Managed Services for Data Centers - Outsourcing that pays for itself

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Integrated solutions for the secure & efficient operation of digital infrastructures

Optimize your IT infrastructure - Future-proof and flexible

A modern, secure IT infrastructure is the basis for digital technologies and applications. That is why it makes sense to rely on fiber-optic cabling solutions from Rosenberger OSI. Benefit from high availability, performance and scalability. We take a comprehensive, individual approach to your IT applications and processes. We have placed our expertise in the service of customer projects for over 30 years. The result: an IT infrastructure that is optimally adapted to your requirements. We will be happy to help you find the optimum solution. Contact us


400GBase-Ethernet800GBase-EthernetSpine-Leaf cablingHigh density panel systemsOn-Premises, colocation or cloud?Data center relocation

Successfully implemented projects - Thats what our customers say

Rosenberger OSI is supporting the expansion of DE-CIX Leipzig

"We appreciate Rosenberger OSI’s short decision-making paths, rapid service provision and operational flexibility. Rosenberger OSI supported us so well with its expertise and proposed solutions that our everyday work was made a lot easier."

envia TEL GmbH

Tier IV Data Center: top-of-the-range components for a maximum reliability

"...That is why we only choose to work with partners and suppliers that can guarantee high quality standards and innovative solutions, such as Rosenberger OSI."

Elmec Informatica S.p.A.

Future-oriented cabling secures the supply network

"Despite the sometimes somewhat critical conditions in the installation environment, the Rosenberger OSI team has implemented our specifications in an exemplary manner..."  

Tennet Holding B.V.

News & Media

Press Releases

Expansion of the production site in Mexico

Cabling specialist expands telecommunications portfolio in Apodaca near Monterrey starting this year and increases number of employees

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Blog & Vlog

The challenge of data center relocation: planning, risks, implementation

Pitfalls to avoid
Decision-making aids
Tips for a smooth process

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Blog & Vlog

Vlog #9 Optimizing IT security: New guidelines and deadlines

OSI Insights in our video-blog:
KritisV, ISO 27001/27002, NIS-2
Digital Operational Resilience Act

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Success Stories

Data highway connection for central Germany

Data highway connection for central Germany. Rosenberger OSI is supporting envia TEL during the expansion of DE-CIX Leipzig

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About Rosenberger OSI

Since 1991 Rosenberger Optical Solutions & Infrastructure (Rosenberger OSI) is a recognized expert for fiber-based connectivity, cabling solutions and infrastructure services in the areas of data centers, local area networks, mobile networks and industrial applications. As an integrated solution provider we have a profound expertise in developing and producing system solutions for communication networks. Our comprehensive service offering enables the secure and efficient operation of digital infrastructures. That combination, along with our strong customer focus as well as being integrated in the worldwide operating Rosenberger Group, is unique and makes us a strong partner in the global market.


1991 founded


830 employees


> 6 Mio. assembled fiber ends per year

Customer satisfaction

> 500 international customers


Rosenberger OSI itself is a member of various associations and thus works actively towards optimising economic constructions, raising product and maintenance quality, and improving production and delivery efficiency.