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DIN ETS 300185-1/A1:1996-01

Отменен
Integrated Services Digital Network (ISDN) - Conference call, add-on (CONF) supplementary service - Digital Subscriber Signalling System No. one (DSS 1) protocol - Part 1: Protocol specification; English version ETS 300185-1/A1:1995
DIN ETS 300185-1/A1:1996-01
Отменен