OENORM EN 301060-6 V 1.1.4
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 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network (incl. Diskette!!!)