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ETSI TS 132 297 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Charging management; Charging Data Record (CDR) file format and transfer (3GPP TS 32.297 version 14.1.0 Release 14)
standard by European Telecommunications Standards Institute, 05/01/2019
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