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ETSI EN 300 093-4
M00000146
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ETSI EN 300 093-4 Integrated Services Digital Network (ISDN); Calling Line Identification Restriction (CLIR) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specifi
standard by European Telecommunications Standards Institute, 06/01/1998
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