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DIN ETS 300303
Integrated Services Digital Network (ISDN) - ISDN-Global System for Mobile Communications (GSM) - Public Land Mobile Network (PLMN) signalling interface; English version ETS 300303:1994
Edition
1995-01
DIN ETS 300523
European digital cellular telecommunications system (Phase 2) - Numbering, addressing and identification; English version ETS 300523:1995
Edition
1995-09
