CONTENTS

 1     Scope 
 2     Normative references       
        2.1     Identical Recommendations | International Standards          
        2.2     Paired Recommendations | International Standards equivalent in technical content    
        2.3     Additional references         
 3     Definitions  
        3.1     Common definitions for MHS        
        3.2     Common definitions for Abstract Syntax Notation One       
        3.3     Voice service definitions     
        3.4     Voice Messaging System Definitions          
 4     Abbreviations   
 5     Conventions     
        5.1     Terms     
        5.2     ASN.1   
 6     Information objects          
 7     Common data types         
        7.1     VM Identifier         
        7.2     OR Descriptor       
        7.3     Spoken Name       
        7.4     Extensions 
 8     Voice message 
        8.1     Heading fields        
        8.2     Body part types     
 9     Voice notifications           
        9.1     Common fields      
        9.2     Receipt notifications           
        9.3     Service notifications           
        9.4     Non-receipt notifications    
10     Primary object types       
       10.1     Voice messaging system user        
       10.2     Voice messaging system    
11     Primary port types          
       11.1     Origination port    
       11.2     Reception port      
       11.3     Management port 
12     Abstract operations        
       12.1     Origination abstract operations      
       12.2     Reception abstract operations       
       12.3     Management abstract operations   
       12.4     Performance of management operations    
13     Abstract errors
       13.1     Subscription error 
       13.2     Recipient improperly specified       
14     Other capabilities
15     Secondary object types  
       15.1     VMGS user agent 
       15.2     VMGS message store       
       15.3     Telephone service access unit        
       15.4     Message transfer system   
16     Secondary port types      
       16.1     Submission port    
       16.2     Delivery port        
       16.3     Retrieval port        
       16.4     Administration port           
       16.5     Import port           
       16.6     Export port           
       16.7     Management port 
17     User agent operation       
       17.1     Performance of origination operations        
       17.2     Invocation of reception operations 
       17.3     Internal procedures           
18     Message Store operation
       18.1     Binding to the MS 
       18.2     Creation of Information Objects    
       18.3     Maintenance of attributes  
       18.4     Voice Messaging MS auto forward action types    
       18.5     Voice messaging MS auto service notification action type  
       18.6     Message store attributes   
       18.7     Procedures for Voice Messaging MS        
19     Message contents           
       19.1     Content 
       19.2     Content type         
       19.3     Content length      
       19.4     Encoded information types
20     Port realization 
21     Conformance   
       21.1     Origination versus reception          
       21.2     Requirements of a VMG conformance statement   
Annex  A – VM Object Identifiers – Reference definition    
Annex  B – VM Abstract Information Objects – Reference definition    
Annex  C – VM Message Store attributes – Reference definition    
Annex  D – Message Store VMGS Auto-Action types – Reference definition    
Annex  E – VMGS functional objects – Reference definition    
Annex  F – VMGS abstract service – Reference definition    
Annex  G – VMGS upper bounds parameters – Reference definition    
Annex H – Mapping of G.726 (1990) and G.728 (1992) into the data component of a voice body part    
        H.1     Illustrative mapping of the analogue/digital converted data  
        H.2     Support for CCITT Rec. G.726 – 32 kbit/s ADPCM        
        H.3     Support for CCITT Rec. G.728 – 16 kbit/s LD-CELP      
INDEX