CONTENTS

 1     Scope 
 2     References 
 3     Introduction      
 4     Feature description          
        4.1     H.501 signalling     
        4.2     RAS signalling       
        4.3     Call signalling – negotiation 
        4.4     Call signalling – release      
        4.5     Call signalling timers           
 5     Generic data usage          
        5.1     Multiple-message release sequence feature 
        5.2     Multiple-message release sequence parameters      
 6     Message flows  
        6.1     Three-message sequence   
        6.2     Time-outs  
        6.3     Two-message sequence     
        6.4     Simultaneous initiation of two-message MMRS procedure  
        6.5     Simultaneous initiation of two- and three-message MMRS procedures        
        6.6     Simultaneous initiation of MMRS and H.225.0 procedures