Foreword
1 Scope
  1.1 Normative references
2 Definitions and abbreviations
  2.1 Location register
  2.2 Authentication Centre (AuC)
  2.3 Equipment Identity Register (EIR)
  2.4 Mobile-services Switching Centre (MSC)
  2.5 Public Land Mobile Network (PLMN)
  2.6 Cell
  2.7 Base Station Controller (BSC) area
  2.8 Location Area (LA)
  2.9 MSC area
  2.10 VLR
  2.11 Zones for Regional Subscription
  2.12 Service area
3 The entities of the mobile system
  3.1 The Home Location Register (HLR)
  3.2 The Visitor Location Register (VLR)
  3.3 The Authentication Centre (AuC)
  3.4 The Equipment Identity Register (EIR)
  3.5 The Mobile-services Switching Centre (MSC)
  3.6 The Gateway MSC (GMSC)
  3.7 SMS Gateway MSC (SMS-GMSC)
  3.8 SMS Interworking MSC
  3.9 The Interworking Function (IWF)
  3.10 The Base Station System (BSS)
  3.11 The Mobile Station (MS)
4 Configuration of a Public Land Mobile Network
  4.1 General
  4.2 Basic configuration
5 PLMN interfaces
  5.1 General
  5.2 Interface between the MSC and Base Station
      System (A-interface)
  5.3 Interface between BSC and BTS (Abis-interface)
  5.4 Interface between the MSC and its associated VLR
      (B-interface)
  5.5 Interface between the HLR and the MSC
      (C-interface)
  5.6 Interface between the HLR and the VLR
      (D-interface)
  5.7 Interface between MSCs (E-interface)
  5.8 Interface between MSC and EIR (F-interface)
  5.9 Interface between VLRs (G-interface)
  5.10 Interface between HLR and AuC (H-Interface)
  5.11 Interface between Mobile Station and Base Station
       System (Um-interface)
6 Interface between the fixed networks and the MSC
History