CONTENTS

 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) – Acknowledge, type 1    
        7.7     ACK(2) – Acknowledge, type 2    
        7.8     NAK-EF – Negative acknowledge, errored frame 
        7.9     NAK-NR – Negative acknowledge, not ready       
       7.10     NAK-NS – Negative acknowledge, not supported           
       7.11     NAK-CD – Negative acknowledge, 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     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-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 – 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 G.994.1 parameters    
       IV.1     Introduction          
       IV.2     Procedure
Appendix V – Rules for code point table numbering    
Bibliography