Services and Protocols for Advanced Networks (SPAN) - Anonymous Call Rejection (ACR) supplementary service - Service description (Endorsement of the English version EN 301798 V 1.1.1 (2000-10) as German Standard)— 1 стр.
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]
