ETSI TS 123 108

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ETSI TS 123 108 English PDF Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Mobile radio interface layer 3 specification; Mobile radio interface layer 3 specification; Core Network Protocols - Stage 2 (3G TS 23.108 version 3.1.0 Release 1999)

standard published 01/01/2000 by European Telecommunications Standards Institute

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This TS specifies the procedures used at the radio interface (Reference Point Um, see GSM 04.02) for Call Control (CC), Mobility Management (MM), and Session Management (SM). When the notations for further study or FS or FFS are present in this TS they mean that the indicated text is not a normative portion of this standard. These procedures are defined in terms of messages exchanged over the control channels of the radio interface. The control channels are described in GSM 04.03. The structured functions and procedures of this protocol and the relationship with other layers and entities are described in general terms in TS 24.007.