DIN EN 300138-1:2000-01

Действует

Integrated Services Digital Network (ISDN) - Closed User Group (CUG) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification (Endorsement of the English version EN 300138-1 V 1.3.4 (1998-06) as German standard) — 1 стр.