UNE-EN 301144-4V1.1.4

Integrated Services Digital Network (ISDN);Digital Subscriber Signalling System No. one (DSS1) and Signalling System No.7 protocols;Signalling application for the mobility management service on the alpha interface;Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user (Endorsed by Asociación Espanola de Normalización in October of 2021.)