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ETSI TS 123 087
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ETSI TS 123 087 Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); User-to-User Signalling (UUS) supplementary service; Stage 2 (3GPP TS 23.087 version 14.0.0 Release 14)
standard by European Telecommunications Standards Institute, 04/01/2017
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Full Description
ETSI TS 123 087 gives the stage 2 description of the User-to-User signalling supplementary services.The User-to-user supplementary service is divided into 3 different services:Service 1 (UUS1)Service 2 (UUS2)Service 3 (UUS3)