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Picture of a double-decker train on the Graz-Köflach Railway
Picture of a double-decker train on the Graz-Köflach Railway © Graz-Köflacher Bahn und Busbetrieb GmbH

Client
Graz-Köflacher Bahn und Busbetrieb GmbH

Place of performance
Styria, Austria

Execution period
06/2020 – 10/2022

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Graz-Köflacher Bahn - Communication System and Control Center

The Graz-Köflacher Bahn (GKB for short) operates 39 bus and 3 rail lines with a length of over 90 kilometers in the greater Graz area as well as southern and western Styria. As part of the overall project, STRABAG Infrastructure & Safety Solutions installed an operational and future-proof communication system based on DMR Tier III.

Two geo-redundantly installed controllers ensure the reliable control of the DMR system, which covers the entire rail network, including two tunnels, with 15 locations. In addition to communication between the train control center and the railcars, the shunting system also uses the new digital radio system.

For networking all sites with the central components and the control center, the GKB's internally operated and secured fiber-optic network is utilized.

In addition to the train radio devices specially adapted for operational requirements, the train control center was equipped with state-of-the-art technology. The NGS3600 serves as the communication management system, integrating the digital radio network, the ÖBB GSM-R train radio and telephony. The dispatcher applications of the workstations enable a safe and easy operation of the entire system.

Services in Detail

Digital communication system for two railway lines

  • DMR Tier III trunked radio network in a simulacast network, equipped with emergency power supply
  • 15 radio cells, each with 10 logical channels
  • Geo-redundant central controller units at two locations
  • Use of the GKB fiber optic network or a directional radio link connection to network external locations
  • Integration of two railway tunnels using SISS repeater systems and radiating cable
  • DMR train radios with specific adaptations for operational use

Train control centers in Graz and Lieboch (each with two locations) as well as Wies and Köflach

  • VoIP communication management system NGS3600 with redundant system structure
  • Central geodata and train number server
  • Connection of telephony, DMR Tier III trunked radio network and the Austrian Federal Railway's GSM-R network
  • Integrated fault reporting and network management system for the DMR network and the NGS3600
  • Redundant voice recording system
  • 9 workstations with IP audio matrix CDI3603 and touch panel operation for dispatcher applications, including a modular dispatcher console with tilt adjustment
  • Train number server for functions mapping the operational workflow