UNE-ETS 300771-1ED1

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] (Endorsed by Asociación Espanola de Normalización in January of 2023.)