DIN ETS 300933:2001 Digital cellular telecommunications system (Phase 2+) - Voice Group Call Service (VGCS) - Stage 2 (Endorsement of the English version ETS 300933:1998-12 as German standard)
2001DIN ETS 300933:2001 Digital cellular telecommunications system (Phase 2+) - Voice Group Call Service (VGCS) - Stage 2 (Endorsement of the English version ETS 300933:1998-12 as German standard)