ETSI EN 300 443-3 English Printed Edition English PDF Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; B-ISDN user-network interface layer 3 specification for basic call/bearer control; Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user

standard published 11/01/1999 by European Telecommunications Standards Institute