ETSI EN 301 065-4
- Final draft Version 1.2.1Integrated Services Digital network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Completion of Calls on No Reply (CCNR) supplementary service; Part 4: Abstract Test Suite (ATS) and partial Protocol Impleme
- standard by European Telecommunications Standards Institute, 12/01/2001
- Publisher: ETSI
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