DIN ETS 300356-6:1995-11
Отменен
Integrated Services Digital Network (ISDN) - Signalling System No. 7; ISDN User Part (ISUP) version 2 for the international interface - Part 6: Connected Line Identification Restriction (COLR) supplementary service [ITU-T Recommendation Q.731, clause 6 (1993), modified]; English version ETS 300356-6:1995
