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ETSI EN 300 058-6
M00002079
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ETSI EN 300 058-6 Integrated Services Digital Network (ISDN); Call Waiting (CW) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network
standard by European Telecommunications Standards Institute, 11/01/1999
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