ETSI TS 124 083
ETSI TS 124 083
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Call Waiting (CW) and Call Hold (HOLD) supplementary services - Stage 3 (3G TS 24.083 version 3.0.0 Release 1999)
standard published 01/01/2000 by European Telecommunications Standards Institute
