UNE-EN 302093-4V1.1.1

Broadband Integrated Services Digital Network (B-ISDN);Digital Subscriber Signalling System No. two (DSS2) protocol;Point-to-point multiconnection bearer control specification in a separated call and bearer environment;Part 4 : Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification (Endorsed by Asociación Espanola de Normalización in January of 2022.)