Public Switched Telephone Network (PSTN) - Calling Line Identification Restriction (CLIR) supplementary service - Service description; English version ETS 300649:1997
Edition 1997-12

European digital cellular telecommunications system (Phase 2) - Mobile Station - Base Station System (MS-BSS) interface - General aspects and principles; English version ETS 300550:1994
Edition 1995-01

Integrated Services Digital Network (ISDN) - Freephone (FPH) supplementary service - Service description; English version ETS 300208:1996
Edition 1996-10

Space engineering - Communications; English version EN 16603-50:2022
Edition 2022-11

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

Integrated Services Digital Network (ISDN); advice of charge: charging information during the call (AOC-D) supplementary service; service description; English version ETS 300179:1992
Edition 1993-09

Integrated Services Digital Network (ISDN) - ISDN Packet Mode Bearer Services (PMBS) - ISDN Virtual Call (VC) and Permanent Virtual Call (PVC) bearer services provided by the B-channel of the user access, basic and primary rate; English version ETS 300048:1997
Edition 1998-08

Digital Enhanced Cordless Telecommunications (DECT) - Global System for Mobile communications (GSM); Integrated Services Digital Network (ISDN); DECT access to GSM via ISDN - General description of service requirements; English version ETS 300787:1997
Edition 1998-07

Integrated Services Digital Network (ISDN); advice of charge: charging information at the end of the call (AOC-E) supplementary service; service description; English version ETS 300180:1992
Edition 1993-09

Integrated Services Digital Network (ISDN); CCITT signalling system no. 7; Transaction Capabilities Application Part (TCAP); English version ETS 300134:1992
Edition 1993-07