Integrated Services Digital Network (ISDN); Freephone (FPH) supplementary service; Service description
NORM herausgegeben am 15.3.1996
Designation standards: ETSI ETS 300208-ed.1
Publication date standards: 15.3.1996
The number of pages: 18
Approximate weight : 54 g (0.12 lbs)
Country: European technical standard
Kategorie: Technische Normen ETSI