Table of Contents

 1     Scope            
 2     References   
 3     Definitions   
        3.1     Terms imported from ITU-T G.805             
        3.2     Terms defined in this Recommendation     
 4     Abbreviations and acronyms  
 5     Conventions
 6     Functional architecture of transport networks     
        6.1     Topological components
        6.2     Derived network constructs for topological viewpoints            
        6.3     Transport entities and their properties         
        6.4     Transport information entities      
        6.5     Transport processing functions     
        6.6     Reference points              
        6.7     Topology           
        6.8     Layer relationships          
        6.9     Transport over composite links     
 7     Transparency and impairments              
        7.1     Inter-layer information dependency.           
 8     Sublayers     
        8.1     Channel forwarding        
        8.2     Destination forwarding   
 9     Transport network availability enhancement techniques  
        9.1     Differentiated connection protection           
        9.2     Composite link protection              
Annex A – Fundamental concepts used in Recommendation ITU-T G.800    
        A.1     Axioms of the unified architecture              
        A.2     Information     
        A.3     Encoding and labelling   
        A.4     Identity and identifiers   
Annex B – Definition and properties of a system    
        B.1     Introduction     
        B.2     Information systems      
        B.3     Basic transfer function and telecommunications network     
Annex C – Communication    
        C.1     Service configuration     
        C.2     Forwarding modes of a transport entity     
        C.3     Monitoring of a transport entity   
Annex D – Transport entity roles    
        D.1     Overview of transport entity roles
        D.2     Roles of the transport entity within an operational domain   
        D.3     Roles of the transport entity across multiple operational domains       
Appendix I – Use of identifiers    
        I.1                   Use of identifiers 
Appendix II – Relationships between architectural entities    
Appendix III – Complexity and scalability of systems    
      III.1     Independence of subsystems       
      III.2     Independence within a lifecycle and between lifecycles         
      III.3     Transparency of telecommunications network services         
Appendix IV – Access points in architecture and equipment Recommendations    
Appendix V – Examples of roles of the transport entity    
        V.1     Examples of roles of the transport entity (TE) within an operational domain    
        V.2     Roles of TE's that span multiple operational domains