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DIN ETS 300125
Integrated Services Digital Network (ISDN); user-network interface data link layer specification; application of CCITT recommendations Q.920/I.440 and Q.921/I.441; english version ETS 300125:1991
Edition
1992-05
DIN ETS 300133-3
Electromagnetic compatibility and Radio spectrum Matters (ERM) - Enhanced Radio MEssage System (ERMES) - Part 3: Network aspects; English version ETS 300133-3:1997
Edition
1998-12
