Public Switched Telephone Network (PSTN) - Category II specification for 14400, 12000, 9600, 7200 and 4800 bits per second duplex modems standardized for use on the PSTN; English version ETS 300492:1996
Edition 1997-08

Integrated Services Digital Network (ISDN) - Call Deflection (CD) supplementary service - Service description; English version ETS 300202:1994
Edition 1995-05

Integrated Services Digital Network (ISDN); Call Waiting (CW) supplementary service; service description; english version ETS 300056:1991
Edition 1992-09

European digital cellular telecommunications system (Phase 2) - Multi Party (MPTY) supplementary services - Stage 2; English version ETS 300545:1995
Edition 1995-09

European digital cellular telecommunications system (Phase 2) - Application of the Base Station System Application Part (BSSAP) on the E-interface; English version ETS 300626:1995
Edition 1996-02

European digital cellular telecommunications system (Phase 2) - Base Station Controller - Base Transceiver Station (BSC-BTS) interface - Layer 2 specification; English version ETS 300595:1994
Edition 1995-02

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) - Call Forwarding Unconditional (CFU) supplementary service - Service description; English version ETS 300200:1994
Edition 1995-05

Safety and control devices for burners and appliances burning gaseous and/or liquid fuels - General requirements; German version EN 13611:2019 + AC:2021
Edition 2022-01

Network Aspects (NA) - Metropolitan Area Network (MAN) - Medium Access Control (MAC) layer management; English version ETS 300273:1994
Edition 1994-10