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ETSI TS 103 389
M00000714
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ETSI TS 103 389 Rail Telecommunications (RT); Global System for Mobile communications (GSM); Usage of Session Initiation Protocol (SIP) on the Network Switching Subsystem (NSS) to Fixed Terminal Subsystem (FTS) interface for GSM Operation on Railways
standard by European Telecommunications Standards Institute, 10/01/2020
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