CONTENTS

 1     Scope 
 2     References
 3     Definitions
 4     Abbreviations 
 5     Conventions    
 6     PSTN/ISDN evolution to NGN  
 7     Aspects to consider when evolving to NGN      
        7.1     Transport  
        7.2     Signalling and control      
        7.3     Management         
        7.4     Services
        7.5     Operation, administration and maintenance (OAM)         
        7.6     Naming, numbering and addressing          
        7.7     Accounting, charging and billing  
        7.9     Call routing          
 8     Service requirements by national regulatory bodies      
 9     Emergency telecommunications in NGN
10     Security aspects of evolution    
Appendix I – Examples of network evolution scenarios    
        I.1        Core network evolution to NGN
        I.2        Access network evolution          
        I.3        Signalling and control scenarios
        I.4        Management scenarios   
        I.5        Services evolution scenarios      
Appendix II – Examples of PSTN/ISDN service evolution    
Appendix III – Billing system evolution scenarios    
BIBLIOGRAPHY