Integrated Services Digital Network (ISDN). Telephony 3.1 kHz teleservice. Service description
NORM herausgegeben am 1.2.1994
Designation standards: STN ETS 300111
Classification mark: 870111
Catalog number: 71258
Publication date standards: 1.2.1994
The number of pages: 14
Approximate weight : 42 g (0.09 lbs)
Country: Slovak technical standard
Kategorie: Technische Normen STN