Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) version 3 for the international interface; Part 20: Completion of Calls on No Reply (CCNR) supplementary service
NORMA vydána dne 30.9.1998
Designation standards: ETSI EN 300356-20-V3.2.8
Publication date standards: 30.9.1998
The number of pages: 51
Approximate weight : 153 g (0.34 lbs)
Country: European technical standard
Kategorie: Technické normy ETSI