Terminal Equipment (TE) - Telephony for the hearing impaired - Electrical coupling of telephone sets to hearing aids; English version ETS 300679:1996
Edition 1997-11

Integrated Services Digital Network (ISDN) - Telephony 7 kHz teleservice - Service description; English version ETS 300263:1994/A1:1996
Edition 1996-10

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

Integrated Services Digital Network (ISDN); telephony 3,1 kHz teleservice; service description; english version ETS 300111:1992
Edition 1993-04

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

Telephony for hearing impaired people - Inductive coupling of telephone earphones to hearing aids; English version ETS 300381:1994
Edition 1995-09

Management of the European Telephony Numbering Space (ETNS) (Endorsement of the English version EN 301161 V 1.2.1 (2002-01) as German standard)
Edition 2003-06

Routeing of calls to European Telephony Numbering Space (ETNS) services (Endorsement of the English version EN 301160 V 1.2.1 (2002-01) as German standard)
Edition 2003-06

Digital cellular telecommunications system (Phase 2+) - GSM Cordless Telephony System (CTS), Phase 1 - Service description - Stage 1 (GSM 02.56 version 8.0.1 Release 1999) (Endorsement of the English version EN 302403 V8.0.1 (2000-10) as German standard)
Edition 2004-03

Digital Enhanced Cordless Telecommunications (DECT) - Radio in the Local Loop (RLL) Access Profile (RAP) - Part 2: Advanced telephony services (Endorsement of the English version EN 300765-2 V 1.2.1 (2001-02) as German standard)
Edition 2002-05