ÖNORM EN 301060-4 V 1.1.4:1999-11
Действует
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 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user (incl. Diskette!!!)
