1 Scope
2
References
3
Abbreviations
3.1 Conventions
4
Definitions
5
Introduction
5.1 Interaction between the VMS and its direct user
5.2 Interaction between a
Voice SFU and its direct user (i.e. VMS)
5.3 Interaction between Voice SFUs
5.4 Interaction between a Voice SFU and direct users of other
services
6
Service description
6.1 Technical requirements
6.2 Accounting and settlement
6.3 Operational aspects
6.4 Interworking
6.5 Message submission
6.6 Access to the service
6.7 Service interconnection
7
Service elements
7.1 Voice message
format service elements
7.1.1 Message deferral services
7.1.2 Voice message identification
7.2 Classification of VM S&F service elements
7.2.1 Access management
7.2.2 Message recipient
7.2.3 Classes of message delivery
7.2.4 Voice-mail notifications
7.2.5 Voice message encoding conversion
8
Access procedures
9
Message delivery procedures
9.1 Automatic call retry
9.2 Call records
9.3 Recovery from interrupted message delivery
10 Quality of service
10.1 Message loss or failure
10.2 Quality of service targets
10.3 Storage capacity
10.4 Public network circuits
10.4.1 Provision
10.4.2 Performance
10.5 Duration of the service
10.6 Inquiries and complaints
Annex A – Format element of service definitions