Tunnels

The Challenge

Tunnel emergency call stations are subject to the strict Austrian ÖNORM regulations. The front panel was to be designed as per the customer’s requirements, particularly where pictograms and help texts were concerned. Also, the front panel was to be fabricated from corrosion-resistant steel with a powder-coated finish in RAL 2004 orange. Given the noisy tunnel environment, the speech signal should be loud and clear, and easy to hear for both staff and the person(s) needing help. This requires special microphones and an appropriate sound volume capacity of the tunnel Intercom station.

The Solution

This was delivered exactly as ordered: an SOS emergency call system with mushroom switch, high-level sound volume and noise cancelling microphone. The front panel is labelled in two languages (German and English) and shows symbols illustrating the call procedure. While an incoming emergency call is being processed, a green LED indicates the ongoing call; errors are indicated in red. The front panel is made of corrosion-resistant, acid-proof steel (V4A 1.4571). The SOS call station is a synergetic combination of various Commend device components: the industrial station, the digital DSP Intercom module, and the vandal-resistant Intercom station.