1     Scope           
 2     Normative references            
 3     Definitions and abbreviations              
        3.1     Definitions       
        3.2     Abbreviations 
 4     Test arrangement    
        4.1     Test environment         
        4.2     Test set-up      
        4.3     Test signal       
        4.4     Signal level      
        4.5     Accuracy of measurements       
 5     Handset technical requirements         
        5.1     Codec independent parameters              
        5.2     Codec relevant parameters       
 6     Headset technical requirements         
        6.1     General description      
        6.2     Codec independent parameters