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GSM-R is based on the proven GSM standard, but also offers numerous railway-specific functions in addition to the continuous transmission of driving instructions; for example, forwarding of text messages and emergency calls. The digital radio system completely replaces the existing communications equipment and therefore contributes to interoperability.

In the GSM-R system which has been developed by different manufacturers, Siemens combines full-scale know-how in the field of railway engineering with many years of experience in telecommunications.

The Siemens Center of Competence in Poole, UK, rounds off the complete ERTMS series with the development and production of GSM-R radio equipment and dispatcher terminals.