CONTENTS

 1     Scope        
 2     References             
 3     Definitions
 4     Abbreviations and acronyms           
 5     Reference models 
        5.1     ATU functional model            
        5.2     User plane protocol reference model
        5.3     Management plane reference model
        5.4     Application models   
 6     Transport protocol‑specific transmission convergence (TPS‑TC) function        
        6.1     Transport capabilities            
        6.2     Interface signals and primitives          
        6.3     Control parameters  
        6.4     Data plane procedures          
        6.5     Management plane procedures         
        6.6     Initialization procedure          
        6.7     On‑line reconfiguration         
        6.8     Power management mode    
 7     Physical media‑specific transmission convergence (PMS‑TC) function            
        7.1     Transport capabilities            
        7.2     Additional functions  
        7.3     Block interface signals and primitives
        7.4     Block diagram and internal reference point signals     
        7.5     Control parameters  
        7.6     Frame structure        
        7.7     Data plane procedures          
        7.8     Control plane procedures      
        7.9     Management plane procedures         
       7.10     Initialization procedures       
       7.11     On‑line reconfiguration        
       7.12     Power management mode   
 8     Physical media-dependent function
        8.1     Transport capabilities            
        8.2     Additional functions  
        8.3     Block interface signals and primitives
        8.4     Block diagram and internal reference point signals     
        8.5     Control parameters  
        8.6     Constellation encoder for data symbols          
        8.7     Constellation encoder for synchronization and L2 exit symbols
        8.8     Modulation  
        8.9     Transmitter dynamic range   
       8.10     Transmitter spectral masks  
       8.11     Control plane procedures     
       8.12     Management plane procedures        
       8.13     Initialization procedures       
       8.14     Short initialization procedures           
       8.15     Loop diagnostics mode procedures   
       8.16     On‑line reconfiguration of the PMD function 
       8.17     Power management in the PMD function      
 9     Management protocol‑specific transmission convergence (MPS‑TC) functions            
        9.1     Transport functions   
        9.2     Additional functions  
        9.3     Block interface signals and primitives
        9.4     Management plane procedures         
        9.5     Power management 
10     Dynamic behaviour            
       10.1     Initialization
       10.2     On‑line reconfiguration (OLR)           
       10.3     Power management
Annex A – Specific requirements for an ADSL system operating in the frequency band above POTS    
        A.1     ATU‑C functional characteristics (pertains to clause 8)             
        A.2     ATU‑R functional characteristics (pertains to clause 8)             
        A.3     Initialization 
        A.4     Electrical characteristics       
Annex B – Specific requirements for an ADSL system operating in the frequency band above ISDN as defined in Appendices I and II of Recommendation ITU‑T G.961    
        B.1     ATU‑C functional characteristics (pertains to clause 8)             
        B.2     ATU‑R functional characteristics (pertains to clause 8)             
        B.3     Initialization 
        B.4     Electrical characteristics       
Annex C – Specific requirements for an ADSL system operating in the same cable as ISDN as defined in Appendix III of Recommendation ITU‑T G.961    
Annex D – ATU‑C and ATU‑R state diagrams    
        D.1     Introduction 
        D.2     Definitions   
        D.3     State diagrams         
      Page
Annex E – POTS and ISDN basic access splitters    
        E.1     Type 1 – POTS splitter – Europe         
        E.2     Type 2 – POTS splitter – North America          
        E.3     Type 3 – ISDN (ITU‑T G.961 Appendix I or II) splitter – Europe  
        E.4     Type 4 – POTS splitter – Japan            
Annex F – ATU‑x performance requirements for region A (North America)    
        F.1     Performance requirements for operation of ADSL over POTS (Annex A)            
        F.2     Performance requirements for operation of all‑digital mode ADSL (Annex I)     
Annex G – ATU‑x performance requirements for region B (Europe)    
        G.1     Performance requirements for operation of ADSL over POTS (Annex A)            
        G.2     Performance requirements for operation of ADSL over ISDN (Annex B)            
        G.3     Performance requirements for operation of all‑digital mode ADSL (Annex I)    
        G.4     Performance requirements for operation of all‑digital mode ADSL (Annex J)    
Annex H – Specific requirements for a synchronized symmetrical DSL (SSDSL) system operating in the same cable binder as ISDN as defined in Appendix III of Recommendation ITU‑T G.961    
Annex I – All‑digital mode ADSL with improved spectral compatibility with ADSL over POTS    
        I.1               ATU‑C functional characteristics (pertains to clause 8)    
        I.2               ATU‑R functional characteristics (pertains to clause 8)    
        I.3               Initialization      
        I.4               Electrical characteristics            
Annex J – All‑digital mode ADSL with improved spectral compatibility with ADSL over ISDN    
        J.1              ATU‑C functional characteristics (pertains to clause 8)    
        J.2              ATU‑R functional characteristics (pertains to clause 8)    
        J.3              Initialization      
        J.4              Electrical characteristics            
Annex K – TPS‑TC functional descriptions    
        K.1     STM transmission convergence (STM‑TC) function      
        K.2     ATM transmission convergence (ATM‑TC) function     
        K.3     Packet transmission convergence function (PTM‑TC)  
Annex L – Specific requirements for a Reach Extended ADSL2 (READSL2) system operating in the frequency band above POTS    
        L.1     ATU‑C functional characteristics (pertains to clause 8)
        L.2     ATU‑R functional characteristics (pertains to clause 8)
        L.3     Initialization 
        L.4     Electrical characteristics        
Annex M – Specific requirements for an ADSL system with extended  upstream bandwidth, operating in the frequency  band above POTS    
        M.1     ATU‑C functional characteristics (pertains to clause 8)           
        M.2     ATU‑R functional characteristics (pertains to clause 8)           
        M.3     Initialization             
        M.4     Electrical characteristics      
Annex N – 64/65-octet PTM‑TC sublayer functional specifications    
        N.1     Scope           
        N.2     References  
        N.3     PTM‑TC functions     
        N.4     Surveillance primitives          
Annex O            
Annex P – Reduced downstream aggregate transmit power requirements    
        P.1     Scope           
        P.2     Downstream ATP requirements          
        P.3     Reduced downstream ATP requirements        
Appendix I – ATM layer to physical layer logical interface    
Appendix II – Compatibility with other customer premises equipment    
Appendix III – The impact of primary protection devices on line balance    
      III.1     Scope            
      III.2     Background   
      III.3     Recommended maximum capacitance of overvoltage protectors          
      III.4     Capacitance matching requirements of overvoltage protectors
      III.5     References    
Appendix IV – Example overlapped PSD masks  for use in a TCM‑ISDN crosstalk environment    
       IV.1     Example downstream PSD masks for use with profiles 5 and 6
       IV.2     Example downstream PSD mask for use with profile 3
Appendix V – Constraints on delay, impulse noise protection, overhead rate,  and net data rate when bonding    
Appendix VI – Packet layer to physical layer logical interface    
       VI.1     Data flow     
       VI.2     Synchronization flow
       VI.3     Control flow 
       VI.4     OAM flow    
Appendix VII – ADSL2 automoding    
      VII.1     Definition of automode         
      VII.2     Automode policies    
      VII.3     Automode performance requirements            
      Page
Appendix VIII – Impact of loop and ATU impedance mismatch on the Hlog accuracy    
     VIII.1     Impact of impedance mismatch on the Hlog error      
     VIII.2     Setting the accuracy requirement for HLOGps             
Bibliography