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DIN ETS 300178
Integrated Services Digital Network (ISDN); advice of charge: charging information at call set-up time (AOC-S) supplementary service; service description; English version ETS 300178:1992
Edition
1993-09
DIN ETS 300208
Integrated Services Digital Network (ISDN) - Freephone (FPH) supplementary service - Service description; English version ETS 300208:1996
Edition
1996-10
DIN ETS 300710
Integrated Services Digital Network (ISDN) - Public Switched Telephone Network (PSTN) - Universal Access Number (UAN) service - Service description; English version ETS 300710:1997
Edition
1997-12
