ETSI ETS 300 926

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ETSI ETS 300 926 English PDF Digital cellular telecommunications system (Phase 2+) (GSM); Voice Broadcast Service (VBS) - Stage 1 (GSM 02.69 version 5.2.1 Release 1996)

standard published 11/01/1998 by European Telecommunications Standards Institute

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SUBJECT In VBS it is optional to perform authentication immediately at call establishment to speed-up the call establishment. Authentication may be delayed, but always has to be performed. The specification does not clearly describe what action to take if the MS active in an VBS is leaving the VBS area.