UNE-EN 301060-3V1.1.3

Integrated Services Digital Network (ISDN);Digital Subscriber Signalling System No. one (DSS1) protocol;Basic call control;Enhancement at the b" service entry point for Virtual Private Network (VPN) applications Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user" (Endorsed by Asociación Espanola de Normalización in August of 2021.)