PD 6664:2000

0 PREFACE
      0.1 Title
      0.2 Normative information
      0.3 Contents
      0.4 History
      0.5 Issue control
      0.6 References
      0.7 Glossary of terms
             0.7.1 Definitions
             0.7.2 Abbreviations
      0.8 Scope
1 SERVICE DESCRIPTION - MOBILE NUMBER PORTABILITY
2 MNP SOLUTION - SIGNALLING RELAY FUNCTION
      2.1 Background - mobile terminated calls
      2.2 Signalling relay principle
      2.3 Direct routeing override principle
      2.4 Direct routeing override - recipient initiated
      2.5 Direct routeing override - donor initiated
3 MNP INTERFACE REQUIREMENTS
      3.1 Network interfaces
      3.2 Signalling interfaces
             3.2.1 Signalling operations affected by MNP
             3.2.2 MTP addressing
             3.2.3 SCCP addressing
             3.2.4 SCCP number plan for signal relaying
             3.2.5 IRN number plan for direct routeing
                      override
      3.3 Requirements on qualifying networks
             3.3.1 Originating network requirements
             3.3.2 Donor network requirements
             3.3.3 Recipient network requirements
             3.3.4 Transit network requirements
4 CALL FLOWS
      4.1 Voice call: basic signalling relay operation
      4.2 Direct routeing override - recipient initiated
      4.3 Direct routeing override - donor initiated
      4.4 Optimal routeing
      4.5 SMS delivery
      4.6 SMS message waiting
      4.7 CCBS
      4.8 Send IMSI
5 SERVICE INTERACTIONS
      5.1 Line identity presentation services
      5.2 Emergency calls
      5.3 CAMEL
      5.4 Echo cancellers
6 CALL TRAP
7 ERROR HANDLING
      7.1 MTP/SCCP/TC errors
      7.2 Unsuccessful call completion or application
             errors
8 S=7 PARALLEL RUNNING AND MNP
APPENDIX A - ADDRESSING EXAMPLE FOR BASIC RELAY OPERATION
APPENDIX B - ADDRESSING EXAMPLE FOR DIRECT ROUTEING OVERRIDE
             OPERATION - RECIPIENT INITIATED

Specifies the operation of UK Mobile Number Portability (MNP), based on a Signalling Relay Functionality implementation (SRF). Based on a feasibility study by the UK telecommunications industry which concluded that from the proposed technical solutions, SRF was the preferred method in the UK. Does not cover billing and administration system requirements; porting process requirements; CDR transfer process requirements or roaming information transfer requirements.