ETSI ETS 300 925

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ETSI ETS 300 925 English PDF Digital cellular telecommunications system (Phase 2+) (GSM); Voice Group Call Service (VGCS) - Stage 1 (GSM 02.68 version 5.2.1 Release 1996)

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

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SUBJECT In VGCS it is opt?l to perform authentication at call establishment to speed-up call establishment. Authentic. may be delayed, but has to be performed. Clarification on handling if talking subscriber leaves the VGCS area