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DIN ETS 300049:1992-08

Отменен
Integrated Services Digital Network (ISDN); ISDN Packet Mode Bearer Services (PMBS); ISDN Virtual Call (VC) and Permanent Virtual Call (PVC) bearer services provided by the D-channel of the user access; basic and primary rate; english version ETS 300049:1992
DIN ETS 300049:1992-08
Отменен