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ETSI EN 300 138-5
M00001203
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ETSI EN 300 138-5 Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Close User Group (CUG) supplementary service; Part 5: Test Suite Structure and Test Purposes (TSS&TP) specification for the network
standard by European Telecommunications Standards Institute, 04/01/2002
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