ETSI EN 300 443-6 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 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing

standard published 12/01/1999 by European Telecommunications Standards Institute