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     Toolkit usage           
        6.1     ITU-T H.248.50 usage in different network models         
        6.2     Overview of toolkit NAT traversal techniques    
        6.3     ITU-T H.248 call/bearer separation, connection model and IP addresses for ephemeral terminations    
        6.4     Specific SDP information elements        
        6.5     Overview of NAT traversal support mechanisms (by ITU-T H.248 entities)              
 7     STUN and TURN support      
        7.1     STUN base package    
        7.2     MG STUN client package          
        7.3     MG TURN client package          
        7.4     MGC STUN client package        
        7.5     STUN information package      
8     ICE support
        8.1     MG act-as STUN server package            
        8.2     Originate STUN continuity check package          
 9     Keep-alive and pinhole support          
        9.1     MGC-originated STUN request package              
        9.2     Keep alive request package