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M00001292
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ETSI TS 129 128
LTE; Universal Mobile Telecommunications System (UMTS); Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) interfaces for interworking with packet data networks and applications (3GPP TS 29.128 version 14.6.0 Release 14)standard by European Telecommunications Standards Institute, 09/01/2019
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