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     Interworking scenarios         
        6.1     Interworking between two peer PTDNs             
        6.2     PTDNs interworking across another PTDN         
        6.3     PTDNs interworking via an IP network (or other PDN)  
        6.4     Interworking of two IP networks (IP islands) via a PTDN              
        6.5     Interworking between a PTDN and a PDN         
 7     Two peer interworking PTDNs           
        7.1     Interworking requirements      
        7.2     Data plane interworking            
        7.3     Control plane interworking       
        7.4     Management plane interworking          
        7.5     OAM interworking       
 8     Interworking across a PTDN                
        8.1     Interworking requirements      
        8.2     Data plane interworking            
        8.3     Control plane interworking       
        8.4     Management plane interworking          
        8.5     OAM interworking       
 9     PTDNs interworking via an IP network (or other PDN)            
        9.1     Interworking requirements      
        9.2     Data plane interworking            
        9.3     Control plane interworking       
        9.4     Management plane interworking          
        9.5     OAM interworking       
10     Two IP networks (IP islands) interworking via a PTDN            
       10.1     Interworking requirements    
       10.2     Data plane interworking           
       10.3     Control plane interworking     
       10.4     Management plane interworking         
       10.5     OAM interworking      
11     Interworking of a PTDN and a PDN 
12     Security considerations       
Bibliography