ETSI TS 122 083
ETSI TS 122 083
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Call Waiting (CW) and Call Holding (HOLD); Supplementary Services - Stage 1 (3GPP TS 22.083 version 4.0.0 Release 4)
standard published 03/01/2001 by European Telecommunications Standards Institute
