DIN ETS 300519:2001-04 Digital cellular telecommunications system (Phase 2) - Advice of Charge (AoC) supplementary services - Stage 1 (Endorsement of the English version ETS 300519:1996-05 as German standard) / Note: Endorsement notice
2001DIN ETS 300519:2001-04 Digital cellular telecommunications system (Phase 2) - Advice of Charge (AoC) supplementary services - Stage 1 (Endorsement of the English version ETS 300519:1996-05 as German standard) / Note: Endorsement notice
2001DIN ETS 300519:2001 Digital cellular telecommunications system (Phase 2) - Advice of Charge (AoC) supplementary services - Stage 1 (Endorsement of the English version ETS 300519:1996-05 as German standard)