ÖNORM EN 300195-6 V 1.2.1:2001-02
Действует
Integrated Services Digital Network (ISDN) - Supplementary service interactions - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network (incl. Diskette!!!)