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Space-saving concepts for datacenters – Servers vs. ETSI racks in the patch location

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Heading towards the Cloud – has the traditional datacenter had its day?

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More speed, higher port density and flexible scalability in the data centre

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RZ-Insight: Design of data centers

DC-Insight: The four most important components of modern data centers

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

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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


30 years of Rosenberger OSI: cabling systems then and now

Can you compare the cabling systems of that time with those of today?
How have they evolved over the past 30 years?
Where is the trend going?

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Building cabling: What is important when choosing a network solution?

Q&A session around the EBO principle
Functionality & advantages
What is the performance of this fibre optic connectivity system?

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Press Releases

Cabling project for the city of Wuppertal

Two new server rooms are equipped with a modern PURE cabling system including LC trunks and 19-inch rack SMAP-G2 housings.

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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