ETSI TS 123 083

ETSI TS 123 083 Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Call Waiting (CW) and Call Hold (HOLD) Supplementary Service; Stage 2 (3GPP TS 23.083 version 5.1.0 Release 5)

standard by European Telecommunications Standards Institute, 09/01/2002