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ETSI TS 102 891-1 Core Network and Interoperability Testing (INT); Message Waiting Indication (MWI) using IP Multimedia (IM) Core Network (CN) subsystem; Conformance Test Specification (3GPP(TM) Release 12); Part 1: Protocol Implementation Conformance Statement (PICS)
standard by European Telecommunications Standards Institute, 06/01/2018
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