Fiber optic deployment, FTTH building connections and network installation - across Germany, to Telekom standards.
Numbers that speak for themselves.
Customer satisfaction
Connections per month
About Us
Reliability, precision and future-ready fiber optic deployment - as an experienced subcontractor, across Germany.
Behind every successful fiber project stands a well-coordinated team. At DataNetzBau, experienced technicians, site managers and project coordinators work hand in hand with a single goal: the highest quality in fiber optic deployment, from civil works through to OTDR measurements.
DataNetzBau GmbH delivers fiber rollout projects across Germany: FTTH, FTTB and FTTx connections, backbone splicing, building connections and network installations for network operators, general contractors and municipalities.
With numerous teams across Germany, we are on the ground wherever the fiber rollout is moving forward - and we are expanding into the Netherlands, Belgium and France. We plan, build and document to a high standard - efficient, safe and Telekom-compliant.
Why DataNetzBau?
What makes us the right partner for your fiber optic infrastructure projects.
Technical Expertise
Experienced technicians, tested fiber optic work and quality to Telekom standards.
Modern Equipment
Equipment from MAL-MET, Fujikura, EXFO and Kaeser. Precise measurements, mobile teams and up-to-date technology.
Germany & Europe
Numerous teams across Germany - and growing in Europe: the Netherlands, Belgium and France. In-house logistics and rapid deployment.
Direct Communication
Dedicated contacts, clear schedules and daily updates ensure transparency and trust.
Ready to start your next project?
Get in touchRapid Response
A helping hand when things go wrong.
When deadlines slip, previous work needs reworking, or extra teams are needed on site at short notice - we’re the helping hand that steps in. Fast, professional, no ramp-up time.
Deadlines at Risk
When the handover date is about to slip, we mobilise within days rather than weeks. Well-coordinated teams, in-house logistics, no slow ramp-up.
Rework & Remediation
Faulty previous work? Splices that won’t hold? Missing documentation? We take over, audit and bring the project back to Telekom standard.
Immediate Mobilisation
Numerous teams across Germany. When you need additional capacity at short notice, we deliver it - also in parallel with your existing team.
Is it burning at your site? We’ll lend you a helping hand.
Get a helping handOur Fiber Optic Services
From initial planning through to handover - we deliver turnkey solutions for fiber deployment in Germany: FTTH, FTTB and FTTx, building connections, splicing and network installation. Cleanly executed, fully documented, ready for acceptance.
Civil Engineering & Duct Work for Fiber
Professional installation of duct systems and cable protection conduits for FTTH, FTTB and backbone routes. We work in open trenching, horizontal directional drilling and trenchless methods - all to DIN and Telekom standards, for long-lasting fiber infrastructure.
Fiber Optic Blowing (FTTH/FTTB)
High-precision micro-cable blowing for FTTH building connections, FTTB feeds and backbone routes. We work with professional blowing equipment from leading manufacturers such as Jetting, Mal-Met and Fremco - to Telekom standard, with experienced specialists and complete blowing documentation.
Splicing & OTDR Measurement
Professional fusion splicing with Fujikura equipment, single-ended and bi-directional OTDR measurements, plus Tier-1 and Tier-2 protocols. Every fiber connection is measured, documented and signed off to Telekom and DIN standards.
Fiber Building Connections (NE3/NE4)
From trenching and wall penetrations to APL installation, we bring the fiber connection safely and professionally into the building - including clean restoration of the outdoor area and complete documentation for the network operator.
IT Technology & Network Installation
Installation and maintenance of active and passive network infrastructure: server cabinets, patch panels, distribution frames, DWDM racks and datacenter cabling - cleanly documented for future-proof network installations.
Completion & Remedial Work
When another contractor has walked away or a site fails acceptance, we take over: condition survey, defect rectification, missing splices and measurements, complete documentation. We bring unfinished fiber projects to a fast, acceptance-ready close - to Telekom standard.
Let’s bring your project to life.
Get in touchOur Team
Experience, precision and passion for fiber optic deployment.
Behind every successful project is a strong team. At DataNetzBau, experienced technicians, site managers and project coordinators share a single goal - delivering the highest quality in fiber optic deployment.
Our teams combine technical expertise with a genuine hands-on mentality. Whether civil engineering, blowing, splicing or measurements - every team member knows what counts: reliability, precision and accountability.
With numerous teams across Germany, we are on the ground wherever progress is being made. We plan, build and document to a high standard - efficiently, safely and sustainably.
Expert Knowledge
Trained professionals with experience in Telekom and DIN standards.
Safety First
Our teams are equipped with modern safety and measurement technology.
Reliable Delivery
Dedicated contacts, clear processes and on-time project delivery.
Together, we shape the future of networks.
Client References
A selection of projects we have delivered for network operators and general contractors across Germany.
Deutsche Infrabau GmbH
Subcontractor on FTTH broadband projects for Deutsche Infrabau GmbH - from NVT assembly and main cable splicing to building connection civil works and documentation.
TNG Stadtnetz GmbH
Comprehensive fiber optic infrastructure work for the regional network operator in Kiel - from building connections to backbone installation.
NetCologne GmbH
Complete FTTH deployment connecting multiple buildings to a passive fiber optic distribution system.
EKN Tiefbau GmbH
Large-scale fiber optic deployment with blowing, splicing and building connections as part of regional cluster development.
LEC Construction International GmbH
Long-term collaboration with LEC on regional FTTH deployments and infrastructure work.
Deutsche Netzbau GmbH
Subscriber and main cable blowing with complete splicing and measurement under general contractor DeNe.
Tempton Technik GmbH
Fiber optic infrastructure deployment for Telekom's AEON project, focused on datacenter and POP integration.
Your Company Here
Maybe your project is next.
Tell us briefly what you are planning. We will look at what is feasible and get back to you with a clear assessment.
Our Certificates
Qualified, tested and certified - our credentials speak for themselves.
FOA CFOT Certification
Certified Fiber Optic Technician to FOA standard (Fiber Optic Association).
DVGW GW129 Safety
Network safety training to DVGW GW129 for work in telecommunications networks.
Network Safety GW 129 (Schaufelmann)
Safety during construction work near utility networks to DVGW GW 129, VDE-AR-N 4224, DWA-M 129 and AGFW FW 606.
Traffic Safety (Schaufelmann)
Certified traffic safety officer for public work zones.
Fire Protection Inspection (TÜV SÜD)
Qualified specialist for fire protection systems - certified by TÜV SÜD Akademie.
First Aid Certificate
First aid training in accordance with DGUV Regulation 1 - for safe on-site work.
Chemical Handling (ISOPA)
Certification for safe chemical handling - compliant with Telekom & EU REACH.
Our credentials are current and recognised for fiber optic deployment in Germany.
They reflect our commitment to quality, safety and reliability - from the construction site to final acceptance.
Frequently Asked Questions About Fiber Deployment
Answers to the most common questions about our fiber optic services, standards and field operations.
We cover the entire fiber rollout: civil works and duct laying, fiber blowing for FTTH, FTTB and FTTx, splicing and OTDR measurements, building connections to NE3 and NE4 standards, plus active and passive network installation in POPs and datacenters - all from a single source, to Telekom and DIN standards.
FTTH (Fiber to the Home) brings the fiber directly into the apartment. FTTB (Fiber to the Building) terminates at the building handover point, with internal distribution from there. FTTx is the umbrella term for all fiber rollout architectures. DataNetzBau plans, builds and documents all three variants - including civil works, blowing and building connection.
Our fiber infrastructure is delivered to Deutsche Telekom standards, DIN norms and VDE. Splicing and OTDR measurements follow Tier-1 and Tier-2 protocols. Our teams include FOA CFOT certified fiber technicians and DVGW GW129 trained staff. Every fiber connection is documented.
NE3 (Network Level 3) is the distribution level between the main distribution frame and the building handover point. NE4 is the in-building distribution level from the APL to the apartment. DataNetzBau delivers both levels - including fiber building connection, APL installation and clean handover to the network operator.
Yes. DataNetzBau works as a subcontractor in fiber deployment for general contractors such as DeNe, NetCologne and EKN as well as for regional network operators. We deliver civil works, micro-cable blowing, splicing, OTDR measurements, building connections and complete backbone routes - to Telekom standard and with full documentation.
With numerous teams across Germany and our own logistics, we typically mobilise within days. We also cover short-notice deployments - for example when another subcontractor drops out or a handover deadline is at risk - with ready-to-deploy fiber teams.
DataNetzBau works on fiber deployment across Germany - from Kiel through the Rhineland down to Bavaria. We are also expanding into the Netherlands, Belgium and France and cover cross-border FTTH and backbone projects.
Every splice is individually measured and protocolled. OTDR measurements are taken single- and bi-directionally (Tier-1 and Tier-2), including attenuation, reflection and length analysis. You receive complete documentation: plans, splice register, OTDR diagrams - all in the format the network operator requires (PDF, XML, EDI).
Your Direct Line to Us
Need help with a fiber optic project? Contact us directly. We are available across Germany.