UNE-EN 301490-2V1.1.1

Private Integrated Services Network (PISN);Inter-exchange signalling protocol;Call transfer supplementary service for the VPN b" service entry point. Part 2: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification" (Endorsed by Asociación Espanola de Normalización in November of 2021.)