1     Scope           
 2     References 
 3     Definitions 
 4     Abbreviations and acronyms              
 5     System reference diagram  
 6     Signals and modulation        
        6.1     Description of signals 
        6.2     Modulation    
        6.3     Transmit filter characteristics 
 7     Description of messages      
        7.1     CL – Capabilities list    
        7.2     CLR – Capabilities list + request             
        7.3     MR – Mode request   
        7.4     MS – Mode select       
        7.5     MP – Mode proposal 
        7.6     ACK(1) – Acknowledgement, type 1     
        7.7     ACK(2) – Acknowledgement, type 2     
        7.8     NAK-EF – Negative Acknowledgement, errored frame 
        7.9     NAK-NR – Negative Acknowledgement, not ready         
       7.10     NAK-NS – Negative Acknowledgement, not supported              
       7.11     NAK-CD – Negative Acknowledgement, cleardown     
       7.12     REQ-MS – Request MS message          
       7.13     REQ-MR – Request MR message         
       7.14     REQ-CLR – Request CLR message        
       7.15     REQ-RTX – Retransmission message  
 8     Structure of messages          
        8.1     Format convention     
        8.2     Frame structure           
        8.3     Frame check sequence field   
        8.4     Octet transparency     
        8.5     Inter-frame time fill    
 9     Message coding format        
        9.1     General           
        9.2     Coding format for parameters in the I and S fields         
        9.3     Identification field (I) 
        9.4     Standard information field (S) 
        9.5     Non-standard information field (NS)   
        9.6     Overall message composition 
10     ITU-T G.994.1 transactions 
       10.1     Basic transactions      
       10.2     Extended transactions             
       10.3     Message segmentation           
       10.4     State transition diagrams        
       10.5     Retransmission transactions  
11     Start-up/cleardown procedures      
       11.1     Duplex start-up procedures   
       11.2     Half-duplex start-up procedures         
       11.3     Cleardown procedure              
12     Error recovery procedures 
13     Management
information base (MIB) elements       
       13.1     Configuration parameters      
Annex A – Support for legacy non-ITU-T G.994.1 devices     
Annex B – Operation over multiple wire pairs     
Annex C – An operating mode for use in the same cable as TCM-ISDN     
        C.1     Scope (supplements clause 1) 
        C.2     Signals and modulation (pertains to clause 6)  
        C.3     Start-up/cleardown procedures (pertains to clause 11)               
Appendix I – ITU-T G.994.1 sample sessions     
Appendix II – Provider code contact information     
Appendix III – Support for legacy DMT-based devices     
Appendix IV – Procedure for the assignment of additional ITU-T G.994.1
parameters     
       IV.1     Introduction  
       IV.2     Procedure      
Appendix V  Rules for code point table numbering     
Bibliography