UNE-EN 301815-5V1.1.1

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 5: Test Suite Structure and Test Purposes (TSS&TP) specification for the network (Endorsed by Asociación Espanola de Normalización in December of 2021.)