UNE-EN 301815-1V1.1.1

Broadband Integrated Services Digital Network (B-ISDN);Digital Subscriber Signalling System No. two (DSS2) protocol;Quality of Service Class and Parameters indication at call/connection establishment;Part 1: Protocol specification [ITU-T Recommendations Q.2965.1 (1999) and Q.2965.2 (1999), modified] (Endorsed by Asociación Espanola de Normalización in December of 2021.)