Table of Contents

 1 Scope            
 2 References   
 3 Definitions   
        3.1 Terms defined elsewhere
        3.2 Terms defined in this Recommendation     
 4 Abbreviations             
 5 Introduction to VS functional architecture and related reference points        
 6 Signalling flows and relevant protocol exchanges               
        6.1 Service management      
        6.2 Alarm and linkage action               
        6.3 Video/audio acquisition 
        6.4 Instant image snapshot  
        6.5 Recording and playback
        6.6 Voice (audio) communication      
        6.7 Far-end camera control