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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 300343
Integrated Services Digital Network (ISDN) - Signalling interworking specification for ISDN User Part (ISUP) version 1; English version ETS 300343:1994
Edition
1995-01
DIN ETS 300360
Integrated Services Digital Network (ISDN) - Signalling System No. 7 - Signalling interworking specification for ISDN User Part (ISUP) version 2; English version ETS 300360:1995
Edition
1995-11
