ETSI TS 123 084
ETSI TS 123 084
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Multi Party (MPTY) supplementary services - Stage 2 (3GPP TS 23.084 version 3.2.0 Release 1999)
standard published 10/01/2000 by European Telecommunications Standards Institute
