DIN ETS 300356-8:1995-11
Отменен
Integrated Services Digital Network (ISDN) - Signalling System No. 7; ISDN User Part (ISUP) version 2 for the international interface - Part 8: User-to-User Signalling (UUS) supplementary service [ITU-T Recommendation Q.737, clause 1 (1993), modified]; English version ETS 300356-8:1995
