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ETSI TS 123 040
M00001473
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ETSI TS 123 040 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Technical realization of the Short Message Service (SMS) (3GPP TS 23.040 version 15.3.0 Release 15)
standard by European Telecommunications Standards Institute, 04/01/2019
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