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The e-Shop for fiber optic professionals | 10% discount on your first online order

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LC-COMPACT Push-Pull-Boot: The perfect solution for high density concepts!

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PreCONNECT® SMAP G2 panel systems

PreCONNECT® SMAP-G2 panel systems - the right solution for every application

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Cloud + Datacenter, Paris

POSTPONED to 23 - 24 September | Paris, Port de Versailles | Booth D25-D29

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Whitepaper OM5 versus OM4

When is OM5 technically and economically viable?

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Relocating a data center successfully in 10 phases

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Consulting Services

Consulting Services for data centers & technical building infrastructures

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PerCONNECT® EcoFlex'IT: The building infrastructure of the future

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High-speed data transmission with parallel optics


Rosenberger OSI

Your expert in innovative fiber optic cabling infrastructure and service solutions

Since 1991 Rosenberger Optical Solutions & Infrastructure (Rosenberger OSI) is an expert in innovative fiber optic cabling infrastructure and service solutions for Data Centers, Local Networks, Telecom and Industrial in Europe. The products and services can be found wherever largest amounts of data have to be transferred quickly and securely. In addition to the development and production of a broad portfolio of fiber optic and copper cabling systems, Rosenberger OSI also offers a variety of services such as planning, installation and maintenance of cabling infrastructure.



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.

Thats what our customers say

MIX – Milan Internet Exchange: the best components for maximum reliability and performance

The decision made by MIX to adopt Rosenberger OSI solutions provides a confirmation of the German company’s technical quality. The objective of Rosenberger OSI has always been to create modular, scalable, and integrated network structures that can guarantee more than 50 % higher channel density in comparable spaces. The use of factory pre-assembled trunk cable technology offers the advantage of not requiring specialists, measurement devices or tools for laying.

Paolo Parabelli, sales manager for Italy at Rosenberger OSI

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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


Effects of corona virus on the utilization of data cabling

Data centers - the hub for a functioning data exchange
What is the significance of a cabling infrastructure that is tailored to requirements in today's…

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Press Releases

PreCONNECT® SEDECIM: APC 8° angled polish optimizes return loss

Cabling specialist achieves excellent return loss values with APC 8° angled polish of multimode MTP®/MPO connectors.

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Press Releases

New online shop is now available for international customers

Products of the cabling specialist can now be ordered online.

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trends for future-oriented data center cabling

Important trends for future-oriented data center cabling - Part 2

High density: Highest port density in the smallest space
Modern data center topology: Spine-Leaf architecture

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About Rosenberger OSI

Rosenberger OSI employs about 620 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