| Number portability – Scope and capability set 1 architecture | 
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                                This Supplement describes number portability in terms of high-level service definitions and terminology and presents a set of high-level network architectures and generic routing methods for NP. These architectures and routing methods are not to be considered exhaustive; they just illustrate some of the options. Other alternatives do exist and may be covered by future capability sets.  | 
                             
                         
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                                | Citation: | 
                                https://handle.itu.int/11.1002/1000/4579 | 
                             
                            
                                | Series title: | 
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                                | Approval date: | 
                                1998-05-15 | 
                             
                            
                            
                            | Approval process: | Agreed |  
                            
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                                    Status: | 
                                
                                    In force | 
                             
                            
                            
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                                    Maintenance responsibility: | 
                                
                                    ITU-T Study Group 11 | 
                             
                            
                            
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                                    Further details: | 
                                
                                    Patent statement(s) 
                                    
                                    
                                    
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