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

Maintenance - Maintenance engineering - Requirements; German version EN 17666:2022
Edition 2023-04

Integrated Services Digital Network (ISDN); circuit-mode 64 kbit/s unrestricted 8 kHz structured bearer service category; service description; english version ETS 300108:1992
Edition 1993-04

Integrated Services Digital Network (ISDN) - ISDN-Global System for Mobile Communications (GSM) - Public Land Mobile Network (PLMN) signalling interface; English version ETS 300303:1994
Edition 1995-01

Testing of materials for semiconductor technology - Determination of traces of elements in liquids - Part 3: Determination of 31 elements in high-purity nitric acid by ICP-MS
Edition 2014-11

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

Electrical networks; algebraification of topology and fundamentals of electrical network calculation
Edition 1988-04

Terminal Equipment (TE); videotex; audio syntax; english version ETS 300149:1992
Edition 1992-11

Terminal Equipment (TE) - Telephony for hearing impaired people - Characteristics of telephone sets that provide additional receiving amplification for the benefit of the hearing impaired; English version ETS 300488:1996
Edition 1996-08

Integrated Services Digital Network (ISDN); Malicious Call Identification (MCID) supplementary service; serving description; english version ETS 300128:1992
Edition 1992-12