Das Zugsicherungs- und Steuerungssystem ETCS (European Train Control System) bildet den Kern des künftigen, den Schienenverkehr europaweit verbindenden European Rail Traffic Management Systems (ERTMS). ###>The ETCS (European Train Control System) is the core of the future European Rail Traffic Management System (ERTMS) which connects rail traffic across Europe. ERTMS, in turn, requires the introduction of the mobile radio basis, GSM-R.