Core transport network of the federal government – KTN-Bund

As the federal government’s network operator, we are also responsible for the technical backbone of the federal government’s networks and the Public Safety Digital Radio. In this central function, the core transport network must fulfil the highest availability and security requirements. Here, we explain what that means.

The basis for the federal core transport network, abbreviated in German as: “KTN-Bund”, is a highly available and highly secure optical fibre infrastructure. It has a total route length of approx. 9,600 kilometres.

Data can be transported via this network with an extremely high bandwidth. Initially, the bandwidth stood at 800 gigabits per second. In the meantime, the capacity has been expanded; up to 3.8 terabits per second (Tbit/s) are now possible via the “KTN-Bund”. The expansion also enables an additional reserve of up to 16 Tbit/s. This makes the “KTN-Bund” even more scalable beyond its current capacity.

The specially secured optical-fibre cables used exclusively by us are connected to numerous exchanges and nodes under our own control. The special ring structure ensures a redundant connection of the individual network components. This makes the “KTN-Bund” a reliable transport platform for voice, data and video communication.

The “KTN-Bund” is constantly being adapted to the requirements resulting from the operation of the federal networks and the Public Safety Digital Radio. It stands for maximum availability, resilience and crisis resistance. It is controlled via two multi-secured network management centres.

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