CONTENTS

1 Scope
2 References
3 Definitions and abbreviations
3.1 Definitions
3.2 Abbreviations
4 E.164 number structures
4.1 International public telecommunication number for geographic areas
4.2 International public telecommunication number for global services
4.3 International public telecommunication number for networks
5 Number portability types
6 Generic implementation of number portability
7 Entities addressed by routing
8 Number portability mechanisms
8.1 Assumptions
8.2 General description
8.2.1 Call rerouted from donor network by use of onward routing principles
8.2.2 Call rerouted by dropback principles from donor network
8.2.3 Call rerouting initiated by "Query on Release (QoR) " principles from donor network
8.2.4 Routing initiated by "All call query" principles
9 Types of addresses and numbers within networks and across network boundaries
9.1 Concatenated address
9.1.1 Description
9.1.2 Brief analysis
9.2 Separated addresses
9.2.1 Description
9.2.2 Brief analysis
9.3 RN only
9.3.1 Description
9.3.2 Brief analysis
9.4 Only DN (normally across network boundaries)
9.4.1 Description
9.4.2 Brief analysis
10 Combinations of addressing types, addressed entities and mechanisms: general signalling requirements
11 Examples of locations of number portability database(s) within networks
11.1 General description
12 Administrative processes