DEUTSCHE TELEKOM TECHNIK GMBH

Their core work

Deutsche Telekom Technik GmbH is the network engineering and infrastructure subsidiary of Deutsche Telekom AG, responsible for building and operating Germany's national telecommunications networks. In quantum communications research, their contribution is straightforward and irreplaceable: they provide live, commercial-grade fiber optic networks as operational testbeds, enabling researchers to validate quantum key distribution (QKD) systems under real-world conditions that no academic lab can replicate. Both H2020 projects they joined depended on their physical fiber infrastructure to bridge the gap between laboratory experiments and field deployment. As a third party in both consortia, they contributed in-kind network access and operational expertise rather than receiving direct EC funding — a pattern typical of large telcos acting as living-lab hosts for research consortia.

What they specialise in

How they've shifted over time

Their initial H2020 engagement in CiViQ (2018) was at the physical layer — photonic networks, fiber links, and quantum key distribution hardware — a pure infrastructure role supporting continuous-variable QKD research. By the time OPENQKD launched in 2019, the focus had shifted decisively toward deployment readiness: quantum-safe architecture, certification frameworks, standardization, and interoperability across multiple operators and countries. This trajectory mirrors the maturation of the quantum communications field itself, moving from proving QKD works in principle to proving it can be certified, standardized, and deployed across real carrier networks at European scale.

They are positioning as the real-world network testbed and standardization voice for quantum-safe communications in Europe — a strategic role that will matter more, not less, as QKD moves from EU-funded research toward commercial carrier deployment.

How they like to work

Deutsche Telekom Technik has participated exclusively as a third party in both H2020 projects — contributing infrastructure and operational expertise without formal consortium membership or EC funding receipts. This reflects the role of a network operator whose primary contribution is access to live fiber rather than publishable research outputs. Despite this arms-length formal role, their involvement in large pan-European consortia (53 unique partners across 13 countries from just two projects) shows they are valued as critical infrastructure enablers whose participation makes field-scale experiments possible at all.

Across just two projects, their infrastructure connected with 53 unique consortium partners spanning 13 countries — figures that reflect involvement in flagship, well-funded pan-European consortia rather than niche bilateral collaborations. Their network reach aligns with Europe's main quantum communications research hubs in Germany, Austria, Spain, and beyond.

What sets them apart

As the engineering arm of Deutsche Telekom — Germany's national telco and one of Europe's largest network operators — they bring something no university, research institute, or SME can offer: thousands of kilometers of live, commercial-grade fiber optic infrastructure spanning real cities and borders. This makes them indispensable for any consortium that needs to demonstrate quantum key distribution working outside the lab under actual carrier conditions. Any project targeting quantum-safe communications deployment, certification bodies, or national security applications should treat access to their network as a competitive differentiator for the consortium.

Highlights from their portfolio

• OPENQKD
  Europe's flagship multi-site QKD testbed initiative, where DT Technik's fiber network formed part of the operational backbone enabling cross-operator interoperability and certification testing at scale.
• CiViQ
  One of the first major EU projects on continuous-variable QKD, where their photonic network infrastructure enabled the critical lab-to-field transfer of quantum communication research.