CONTENTS

 1     Scope 
 2     References 
 3     Definitions  
 4     Abbreviations   
 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 ITU‑T Rec. G.961 Appendices I and II    
        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 ITU‑T Rec. G.961 Appendix III    
        C.1     Scope (supplements clause 1)       
        C.2     References
        C.3     Definitions (supplements clause 3) 
        C.4     Abbreviations (supplements 4)      
        C.5     Reference models (supplements 5)
        C.6     Transport Protocol Specific Transmission Convergence (TPS‑TC) function
        C.7     Physical Media Specific Transmission Convergence (PMS‑TC) function (supplements clause 7)    
        C.8     Physical media-dependent function (supplements 8)           
        C.9     Management Protocol Specific Transmission Convergence (MPS‑TC) functions (supplements clause 9)    
       C.10     Dynamic behaviour          
        C.K     TPS-TC functional description     
Annex C.A – Specific requirements for an Annex C-based ADSL system operating with a downstream bandwidth of 1104 kHz and an upstream bandwidth of 138 kHz    
                  C.A.1     ATU‑C functional characteristics (pertains to 8)   
                  C.A.2     ATU‑R functional characteristics (pertains to 8)   
                  C.A.3     Initialization         
Annex C.B – Specific requirements for an Annex C-based ADSL system operating with a downstream bandwidth of 1104 kHz and an upstream bandwidth of 276 kHz    
                  C.B.1     ATU‑C functional characteristics (pertains to 8)   
                  C.B.2     ATU‑R functional characteristics (pertains to 8)   
                  C.B.3     Initialization         
Annex D – ATU‑C and ATU‑R state diagrams    
        D.1     Introduction          
        D.2     Definitions 
        D.3     State diagrams      
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 Rec. 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 ITU‑T Rec. G.961 Appendix III     
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    
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    
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