Integrated Services Digital Network (ISDN); Freephone (FPH) supplementary service; Functional capabilities and information flows
NORMA vydaná dňa 15.3.1996
Designation standards: ETSI ETR 209-ed.1
Publication date standards: 15.3.1996
The number of pages: 57
Approximate weight : 171 g (0.38 lbs)
Country: European technical standard
Kategória: Technické normy ETSI