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 (3G TS 22.083 version 3.0.1 Release 1999)
standard published 01/01/2000 by European Telecommunications Standards Institute
