| Signalling System No.7 testing and planning tools | 
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                                | Citation: | 
                                https://handle.itu.int/11.1002/1000/3688 | 
                             
                            
                                | Series title: | 
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                                | Approval date: | 
                                1995-10-17 | 
                             
                            
                            
                            | Approval process: | TAP |  
                            
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                                    Status: | 
                                
                                    In force | 
                             
                            | Observation: | Formerly Supplement 1 to Q.780 series |  
                            
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                                    Maintenance responsibility: | 
                                
                                    ITU-T Study Group 11 | 
                             
                            
                            
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                                    Further details: | 
                                
                                    Patent statement(s) 
                                    
                                    
                                    
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