DIN EN 300356-4:2000-09

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) (Endorsement of the English version EN 300356-4 V 4.2.1 (2001-07) as German standard).

Integrated Services Digital Network (ISDN) - Signalling System No. 7; ISDN User Part (ISUP) version 3 for the international interface - Part 4: Calling Line Identification Restriction (CLIR) supplementary service [ITU-T Recommendation Q.731, clause 4 (1993), modified] (Endorsement of the English version EN 300356-4 V 3.1.3 (1998-08) as German standard)