New Swiss Railway Tunnel Deploys Tetrapol Technology
Monday, June 13, 2016 | Comments

The world’s longest railway tunnel, Switzerland’s Gotthard Base Tunnel, uses a Polycom radio communications system based on Tetrapol technology from Airbus Defence and Space. Because of the tunnel’s length of 57 kilometers, a secure and stable radio communications system is vital to coordinate the work of emergency services in the event of a technical failure or fire incident.

Police, first responders and ambulance services use the system in the Gotthard tunnel, along with firefighters and Swiss Federal Railways rescue trains. Polycom is a secure nationwide radio communications system for public rescue and safety organizations, as well as for operators of critical infrastructures. Polycom covers Switzerland and Liechtenstein.

Before the inauguration in the first week of June, the two single-track tunnels were equipped with the Polycom system. Each tunnel tube has a Polycom radio system consisting of two overlapping cells for both tubes. Each cell works independently and is based on nine radio transceiver stations. A radiating feeder cable that receives the radio signal from two directions ensures coverage in the tunnel. Communications would thus be possible on both sides even if parts of the system were damaged by fire.

The tunnel itself is breaking records. Trains run at high speeds through the tunnel, located at 2,300 meters below the surface. After 10 years of construction, the Gotthard Base Tunnel system is the world’s longest and deepest railway tunnel. It connects Northern and Southern Europe and is the heart of the New Rail Link through the Alps (NRLA).

AlpTransit Gotthard managed the construction of the tunnel, while engineering, installation and commissioning of the Polycom system was managed by Atos Switzerland.

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