Table of Contents

 1     Scope            
 2     References   
 3     Definitions   
 4     Abbreviations and acronyms  
 5     Assumptions and partitioning  
 6     Basic CAS package   
        6.1     Properties           
        6.2     Events
        6.3     Signals
        6.4     Statistics            
        6.5     Procedures         
 7     Basic CAS addressing package               
        7.1     Properties           
        7.2     Events
        7.3     Signals
        7.4     Statistics            
        7.5     Procedures         
 8     Robbed bit signalling package 
        8.1     Properties           
        8.2     Events
        8.3     Signals
        8.4     Statistics            
        8.5     Procedures         
 9     Operator services and emergency services package            
        9.1     Properties           
        9.2     Events
        9.3     Signals
        9.4     Statistics            
        9.5     Procedures         
10     Operator services extension package    
       10.1     Properties         
       10.2     Events               
       10.3     Signals              
       10.4     Statistics           
       10.5     Procedures       
Appendix I – Call flows    
        I.1     Basic single-stage MF or DTMF wink start or immediate start
        I.2     EAOSS termination – Telephone company operator services call         
        I.3     EAOSS termination – IC/INC operator services call indirect through an access tandem (Overlap outpulsing)    
        I.4     EAOSS termination – IC/INC operator services call indirect through an access tandem (No overlap outpulsing)    
        I.5     EAOSS termination – IC/INC "National" operator direct to the IC/INC (Overlap outpulsing)    
        I.6     EAOSS termination – IC/INC "National" operator direct to the IC/INC (No overlap outpulsing)    
        I.7     EAOSS origination – Telephone operating company serves the call