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ETSI TS 100 933

M00001255

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ETSI TS 100 933 Digital cellular telecommunications system (Phase 2+) (GSM); Voice Group Call Service (VGCS); Stage 2 (GSM 03.68 version 7.0.0 Release 1998)

standard by European Telecommunications Standards Institute, 08/01/1999

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ASCI Phase 3