ETSI TS 123 083
ETSI TS 123 083
Universal Mobile Telecommunications System (UMTS); Digital cellular telecommunications system (Phase 2+); Call Waiting (CW) and Call Hold (HOLD) Supplementary Service; Stage 2 (3GPP TS 23.083 version 4.2.0 Release 4)
standard published 04/01/2001 by European Telecommunications Standards Institute
