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ETSI ETS 300 049
M00000408
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ETSI ETS 300 049 Integrated Services Digital Network (ISDN); ISDN Packet Mode Bearer Service (PMBS); ISDN Virtual Call (VC) and Permanent Virtual Circuit (PVC) bearer services provided by the D-channel of the user access - basic and primary rate
standard by European Telecommunications Standards Institute, 12/01/1997
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