ÖNORM EN 300207-4 V 3.1.1:2002-02
Действует
Integrated Services Digital Network (ISDN) - Diversion supplementary services - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user (incl. Diskette!!!)
