UNE-EN 301067-6V2.1.1

Broadband Integrated Services Digital Network (B-ISDN);Digital Subscriber Signalling System No. two (DSS2) protocol;Connection characteristics;Negotiation during call/connection establishment phase;Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network (Endorsed by Asociación Espanola de Normalización in September of 2021.)