1 Scope
2 References
3 Definitions and abbreviations
  3.1 External definitions
  3.2 Internal definitions
      3.2.1 Access rights
      3.2.2 Authentication
      3.2.3 Call Completion WTM user Not Reachable
      3.2.4 Call Forwarding WTM user Not Reachable
      3.2.5 Calling user
      3.2.6 Coverage area
      3.2.7 CTM user
      3.2.8 Fixed Part (FP)
      3.2.9 Handover
      3.2.10 Location area
      3.2.11 Mobile station
      3.2.12 Network operator
      3.2.13 Optional service feature
      3.2.14 Private
      3.2.15 Private User Mobility (PUM)
      3.2.16 Public
      3.2.17 Public ISDN
      3.2.18 Roaming
      3.2.19 Service
      3.2.20 Service feature
      3.2.21 Service provider
      3.2.22 Service profile
      3.2.23 Service subscriber
      3.2.24 Visitor Database (VDB)
      3.2.25 Visitor area
      3.2.26 WTM Location area
      3.2.27 WTM Location deregistration
      3.2.28 WTM Location registration
      3.2.29 Wireless Terminal Mobility-Authentication
             of Network
      3.2.30 Wireless Terminal Mobility-Authentication
             of Terminal
      3.2.31 WTM user
      3.2.32 Wireless Terminal Mobility number
      3.2.33 Wireless Terminal Mobility User (WTM user)
  3.3 Abbreviations
4 Description
  4.1 Location functions
      4.1.1 WTM Location Registration (WTLR)
      4.1.2 WTM Location De-registration
  4.2 Call handling functions
      4.2.1 WTM Incoming call (WTMI)
      4.2.2 WTM Outgoing call (WTMO)
      4.2.3 WTM Handover (WTH)
      4.2.4 Emergency call
  4.3 Security functions
      4.3.1 Authentication of WTM users (WTAT)
      4.3.2 Authentication of the telecommunication
             network (WTAN)
      4.3.3 Encryption of user data and signalling
             information
  4.4 Access to supplementary services for roaming WTM
      users
      4.4.1 General
      4.4.2 Service Profile Transfer
      4.4.3 Signalling enquiry
      4.4.4 Remote access
      4.4.5 Predefined service profiles
      4.4.6 User management of service profiles
  4.5 Recommended new WTM specific supplementary services
      4.5.1 Call Completion - WTM user Not Reachable
             (CCNRc)
      4.5.2 Call Forwarding - WTM user Not Reachable
             (CFNRc)
      4.5.3 WTM Message Waiting
      4.5.4 Over the Air subscription registration
  4.6 Recommended WTM specific data service
      4.6.1 General
      4.6.2 Circuit Switched Data
      4.6.3 Point-to-Point Protocol (PPP) datagram
             transport
      4.6.4 WTM Point-to-Point Short Message Service
      4.6.5 Other standards related to WTM
5 Packaging of WTM services
  5.1 Roaming within a single PISN
      5.1.1 Basic call
      5.1.2 Data calls
      5.1.3 Short Message Service (SMS)
  5.2 Roaming between networks
      5.2.1 Basic call
      5.2.2 Short Message Service (SMS)
      5.2.3 Data calls
6 Interaction with PISN ISDN based supplementary
  services
7 Interaction with ISDN supplementary services
8 Roadmap for the development of WTM standards
  8.1 Development of new WTM standards
  8.2 Proposed handling of old standards