Private Telecommunication Network (PTN) - Signalling protocol at the S-reference point - Circuit mode basic services; English version ETS 300192/A1:1996
Edition 1996-08

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

European digital cellular telecommunications system (phase 2) - Unstructured Supplementary Service Data (USSD), stage 3; English version ETS 300572:1995
Edition 1995-08

Private Telecommunication Network (PTN); signalling at the S-reference point; generic keypad protocol for the support of supplementary services; English version ETS 300190:1992
Edition 1993-09

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol, Circuit mode basic services, Data Link Layer (DLL) - Part 1: Test Suite Structure and Test Purposes (TSS&TP); English version ETS 300804-1:1998
Edition 1998-12

Space engineering - SpaceFibre - Very high-speed serial link; English version EN 16603-50-11:2020
Edition 2020-11

Integrated Services Digital Network (ISDN) - Audio characteristics of terminals designed to support conference services in the ISDN; English version ETS 300807:1997
Edition 1998-07

Integrated Services Digital Network (ISDN); 3,1 kHz telephony teleservice; end-to-end compatibility requirements for telephony terminals; english version ETS 300082:1992
Edition 1992-06

Integrated Sevices Digital Network (ISDN); 3,1 kHz telephony teleservice; attachment requirements for handset terminals; english version ETS 300085:1990
Edition 1992-02

Distribution automation using distribution line carrier systems - Part 5-1: Lower layer profiles; The spread frequency shift keying (S-FSK) profile (IEC 61334-5-1:2001); German version EN 61334-5-1:2001; Text in English
Edition 2001-12