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DIN ETS 300546
European digital cellular telecommunications system (Phase 2) - Closed User Group (CUG) supplementary services - Stage 2; English version ETS 300546:1996
Edition
1996-08
DIN ETS 300137
Integrated Services Digital Network (ISDN); Closed User Group (CUG) supplementary service; functional capabilities and information flows; english version ETS 300137:1992
Edition
1992-12
DIN ETS 300136
Integrated Services Digital Network (ISDN); Closed User Group (CUG) supplementary service; service description; english version ETS 300136:1992
Edition
1992-12
DIN ETS 300613
Digital cellular telecommunications system (Phase 2) - Subscriber, Mobile Equipment (ME) and services data administration; English version ETS 300613:1996
Edition
1997-07
