DIN EN 300092-1:2001-09
Действует
Integrated Services Digital Network (ISDN) - Calling Line Identification Presentation (CLIP) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification (Endorsement of the English version EN 300092-1 V 2.1.1 (2001-02) as German standard)
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