ETSI TS 124 008

Digital cellular telecommunications system (Phase 2 ) (GSM); Universal Mobile Telecommunications System (UMTS); Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 (3GPP TS 24.008 version 4.5.0 Release 4) Edition: 4.5.0
European Telecommunications Standards Institute / 01-Dec-2001 / 455 pages