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DIN ETS 300675
Integrated Services Digital Network (ISDN) - Autographic conference teleservice - Service description; English version ETS 300675:1996
Edition
1997-11
DIN ETS 300623
Digital cellular telecommunications system (Phase 2) - Network Management (NM) procedures and messages on the A-bis interface; English version ETS 300623:1996
Edition
1997-07