CONTENTS

 1     Scope 
 2     References 
 3     Definitions  
 4     Abbreviations and acronyms        
 5     Conventions     
 6     TDM‑IP interworking      
 7     General requirements       
        7.1     User plane requirements     
        7.2     Management plane aspects
        7.3     Fault management aspects  
        7.4     Traffic management aspects           
        7.5     Connection admission control for the IWF  
 8     Functional group considerations for TDM‑IP network interworking          
        8.1     IP    
        8.2     UDP
        8.3     Common interworking indicators    
        8.4     Optional timing information 
        8.5     TDM payload        
        8.6     Summary of encapsulation format   
 9     Payload formats
        9.1     Structure-agnostic transport           
        9.2     Structure-aware transport  
10     Timing aspects 
11     Packet loss aspects         
12     Support of CAS and CCS          
       12.1     Support of CAS   
       12.2     Support of CCS   
13     Security considerations   
Appendix I – Optional processing of HDLC-based CCS signals    
Appendix II – IP network performance metrics    
       II.1     Errors in the IP network that impact TDM service   
       II.2     Relationship to TDM service impairment metrics     
       II.3     Availability requirements     
       II.4     Voice quality requirements  
Appendix III – Suggested payload sizes for structure-agnostic transport    
Appendix IV – Suggested number of AAL 1 SAR PDUs per packet