Table of Contents

 1     Scope          
 2     References
 3     Definitions
        3.1     Terms defined elsewhere       
        3.2     Terms defined in this Recommendation           
 4     Abbreviations and acronyms             
 5     Conventions            
 6     Gateway structure
 7     Testing procedure 
 8     General description of the gateway testing 
 9     Assessment criteria for a heterogeneous gateway