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DIN ETS 300666-1:1997-09

Действует
Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol; Connected Line Identification Restriction (COLR) supplementary service - Part 1: Protocol specification [ITU-T Recommendation Q.2951, clause 6 (1995), modified]; English version ETS 300666-1:1996