ETSI TS 123 083
ETSI TS 123 083
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Call Waiting (CW) and Call Hold (HOLD); Supplementary Service; Stage 2 (3GPP TS 23.083 version 4.3.0 Release 4)
standard published 12/01/2001 by European Telecommunications Standards Institute
