Integrated Services Digital Network (ISDN); Completion of Calls to Busy Subscriber (CCBS) supplementary service; Service description
NORM herausgegeben am 15.10.1995
Designation standards: ETSI ETS 300357-ed.1
Publication date standards: 15.10.1995
The number of pages: 25
Approximate weight : 75 g (0.17 lbs)
Country: European technical standard
Kategorie: Technische Normen ETSI