ETSI EN 301 067-4 English Printed Edition English PDF Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; Negotiation during call/connection establishment phase; Part 4: Abstract Test Suite (ATS) and partial Protocol Implementations eXtra Information for Testi

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