ETSI TS 124 080
ETSI TS 124 080
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Mobile radio interface layer 3 supplementary services specification; Formats and coding (3GPP TS 24.080 version 3.4.0 Release 1999)
standard published 09/01/2000 by European Telecommunications Standards Institute
