Human Factors (HF) - Assignment of alphabetic letters to digits on standard telephone keypad arrays; English version ETS 300640:1996
Edition 1997-04

Human Factors (HF) - Telephone Prepayment Cards - Tactile Identifier; English version ETS 300767:1997
Edition 1998-05

Human Factors (HF) - Minimum Man-Machine Interface (MMI) to public network based supplementary services; English version ETS 300738:1997
Edition 1998-04

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

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