Communication at the construction site using voice over WLAN The tunnel supplying Jerusalem with water will be almost 13 kilometers long when it is completed in November 2020. Mekorot, Israel‘s national water supplier, and the German-Austrian joint venture Züblin-Jäger began prepara- tions for the tunnel-construction proj- ect in April 2016. The tunnel is to be built between Eshtaol and En Karem 350 meters below the communities of Kesalon and Ramat Raziel. “We need a stable and reliable radio system for the tunnel-building phases in order to guarantee the communi- cation for workers in the tunnel,” says Andreas Ratzke, IT coordinator for Tun- neling Division 2I at Ed. Züblin AG. “As a result of regulatory requirements in Israel, our communications specialist providing assist

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