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 3.5.0 Release 1999) Edition: 3.5.0
European Telecommunications Standards Institute / 01-Jul-2001 / 55 pages