ETSI EN 300 092-4 English Printed Edition English PDF Final draft Version 1.3.1Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Calling Line Identification Presentation (CLIP) supplementary service; Part 4: Abstract Test Suite (ATS) and partial Protocol Implemlentation eXtra Information for Testi

standard published 12/01/2001 by European Telecommunications Standards Institute