Telephony for hearing impaired people; Inductive coupling of telephone earphones to hearing aids
NORM herausgegeben am 6.12.1994
Designation standards: ETSI ETS 300381-ed.1
Publication date standards: 6.12.1994
The number of pages: 20
Approximate weight : 60 g (0.13 lbs)
Country: European technical standard
Kategorie: Technische Normen ETSI