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ETSI TS 132 251
M00002211
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ETSI TS 132 251 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management;Charging management;Packet Switched (PS) domain charging (3GPP TS 32.251 version 14.4.0 Release 14)
standard by European Telecommunications Standards Institute, 12/01/2018
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