ETSI TS 124 010
ETSI TS 124 010
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Mobile radio interface layer 3; Supplementary services specification; General aspects (3GPP TS 24.010 version 4.2.0 Release 4)
standard published 12/01/2001 by European Telecommunications Standards Institute
