DIN ETS 300661-1:2000-05

Действует

Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol; Direct Dialling In (DDI) supplementary service - Part 1: Protocol specification [ITU-T-Recommendation Q.2951, clause 1 (1995), modified] (Endorsement of the English version ETS 300661-1:1997 as German Standard)

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ÖNORM EN 300771-1 V 2.0.1:2000-07

Действует

Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol - B-ISDN user-network interface layer 3 specification for point-to-multipoint call/bearer control - Part 1: Protocol specification [ITU-T Recommendation Q.2971 (1995), modified]

ÖNORM EN 301487-1 V 1.1.1:2000-12

Действует

Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol - Switched virtual path capability - Part 1: Protocol Specification [ITU-T Recommendation Q.2934 (1999), modified]