Need for Speed - Update 400 & 800 Gigabit Ethernet | Choosing the right datacenter cabling

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Webtalk: At high speed into the Cloud - What counts in the IT infrastructure of a colocation DC!

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Industrial applications | Extreme robust FO cabling technology for demanding environments

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Consulting Services for data centers & technical building infrastructures

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Individual LAN check for businesses | Take your IT network to the next level

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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

Fiber optic connectivity | Cabling solutions | Infrastructure services

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.


As a partner of the market leaders, we are setting the standards for the future.


Products - Perfect to the last detail

We deliver sustainable solutions for data centers and local networks: Flexibly and fast!

FO Cabling

The Rosenberger OSI cabling systems are comprehensive solutions for structured cabling. All components are perfectly matched and thus, guarantee highest reliability.

LAN Cabling

Cabling design created by experts, operational flexibility, modularity and fast, simple installation with performance guaranteedthat's what our lan cabling systems stand for.

Copper Cabling

Thanks to our decades of experience in data center cabling, we are very familiar with their requirements. Our solution: factory-assembled copper data trunks.

Successfully implemented projects - Thats what our customers say

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.

Structured cabling for a digital future

"...We were won over not just by the excellent value for money of the solution but also by the commitment and on-schedule conduct of the project and, last but not least, the personal consulting we received throughout the entire project phase."

envia TEL GmbH

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.

Flexible physical layer infrastructure ensures VUB keeps pace with the future

"With Rosenberger OSI as our strategic long term cabling infrastructure partner for the past 15 years we have been assured of a highly reliable and future-proofed physical layer solution..."

Universalbank VUB

Comprehensive services - Rely on the experts

To perform at the highest level, a data center must have state-of-the-art cabling products. But expert planning and installation are also of utmost importance, as is continuous maintenance. IT applications are becoming less and less fault-tolerant whereas their sophistication increases. Even a minor flaw can adversely affect overall performance. With Rosenberger OSI Services you’ll feel confident in every phase of your project.

News & Media

Blog & Vlog

Need for Speed - Update 400 & 800 Gigabit Ethernet

Ethernet Roadmap: 400 & 800 gigabit applications
The singlemode future: 400GBASE-DR4
The multimode future: 400GBASE-SR8 with MTP®/MPO 16

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Blog & Vlog

Vlog #3 Innovation - more than just a buzzword

OSI Insights in our video-blog:
What exactly is different in this organizational form?
What are the advantages for the employees?

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Press Releases

Rosenberger OSI receives OHRIS certificate

The award for a safe working environment is a further step in the company's digitalization offensive launched in 2021.

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Blog & Vlog

Vlog #2 No hierachies - key to sucess

OSI Insights in our video-blog:
What exactly is different in this organizational form?
What are the advantages for the employees?

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About Rosenberger OSI

Rosenberger OSI employs about 740 people and has been a part of the globally operating Rosenberger Group since 1998. As an independent, medium-sized company which is part of the Rosenberger Group, we consciously avoid rigid hierarchies, opting instead for a flexible, process-oriented organisation.






> 4 Mio.
fiber ends
per year

Customer satisfaction

> 500