CONTENTS

 1     Scope
 2     Normative references
 3     Definitions
        3.1     Entities
        3.5     Numbers
        3.6     Networks
        3.7     Exchanges
        3.8     Other definitions
 4     Abbreviations
 5     Objectives
 6     Classification of Number Portability
        6.1     Location Portability
        6.2     Service Portability
        6.3     Service Provider Portability
        6.4     Concatenation of types of Number Portability
        6.5     Number Portability domains
 7     Generic assumptions for Number Portability
        7.1     General
        7.2     How is Number Portability generically performed
        7.3     Implications of Number Portability
 8     High-level network models for Service Provider Portability of Geographic Numbers
        8.1     Background information
        8.2     General introduction to described models
        8.3     Call re-routing initiated/performed by Donor Network
                  8.3.1     Call re-routed from Donor Network by use of onward routing principles
        8.4     Call re-routing initiated/performed by Transit Network prior to Donor Network
                  8.4.1     Re-routing initiated by "All call query one-step" principles
        8.5     Call re-routing performed by Originating Network
                  8.5.1     Re-routing initiated by "All call query one-step" principles
        8.6     Call re-routing to Recipient performed by a two-step number translation principle
                  8.6.1     General description
                  8.6.2     Onward routing by Donor combined with query by Recipient Network
                  8.6.3     "All call query" by Transit Network combined with query by Recipient Network
                  8.6.4     "All call query" by Originating Network combined with query by Recipient Network
                  8.6.5     Interaction with supplementary services
                  8.6.6     Interaction with IN-based services
                  8.6.7     Interaction with carrier selection
                  8.6.8     Interaction with statistical counters
                  8.6.9     Required Forward information transfer between Networks
                 8.6.10     Required backward information transfer between networks
                 8.6.11     NP routing loop detection issues
        8.7     Call re-routing performed by using "All call query all involved networks" principles
                  8.7.1     General description
                  8.7.2     Interaction with supplementary services
                  8.7.3     Interaction with IN-based services
                  8.7.4     Interaction with carrier selection
                  8.7.5     Interaction with statistical counters
                  8.7.6     Required forward information transfer between networks
                  8.7.7     Required backward information transfer between networks
                  8.7.8     NP routing loop detection issues
 9     Network architecture for non-circuit-related signalling support for ported Geographic Numbers
        9.1     Background information
        9.2     Addressing requirements for routing of non-circuit-related messages
        9.3     Network architecture models
                  9.3.1     Non-circuit-related message re-routing by the Donor Network/Exchange
                  9.3.2     Non-circuit-related message re-routing by the Originating Network/Exchange
                  9.3.3     Non-circuit-related message re-routing at the SPR
10     Generic Distributed Functional Entity Model for Number Portability
       10.1     General information
       10.2     Call Control Function (CCF)
       10.3     Call Control Portability Function (CCPF)
       10.4     Number Portability Control Function (NPCF)
       10.5     Number Portability Data Function (NPDF)
       10.6     Number Portability Management Function (NPMF)
       10.7     Master Number Portability Management Function (M-NPMF)
11     Service Provider Portability for Non-Geographic Numbers (NGNP)
12     Concatenation of Service Provider Portability for Non-Geographic Numbers (NGNP) and Geographic Numbers (GNP)
13     Routing and addressing of calls towards portable numbers
14     Routing and addressing for calls from portable numbers
Annex A – IN support for Service Provider Portability of Geographic Numbers
        A.1     General information
        A.2     IN trigger conditions, circuit-related signalling to Geographic Numbers
                  A.2.1     General information
        A.3     IN trigger conditions, non-circuit-related signalling to Geographic Numbers