Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 4: Calling Line Identification Restriction (CLIR) supplementary service [ITU-T Recommendation Q.731, clause 4 (1993) modified]
NORMA vydána dne 18.7.2001
Designation standards: ETSI EN 300356-4-V4.2.1
Publication date standards: 18.7.2001
The number of pages: 9
Approximate weight : 27 g (0.06 lbs)
Country: European technical standard
Kategorie: Technické normy ETSI