1 Purpose
and scope
1.1 General
1.2 Message handling systems used in the provision of VM-service
2
VM-service
2.1 General service requirements
2.2 VM-service features
2.3 Responsibility boundaries
2.4 Message store
2.5 Telephone service access unit
2.6 Use of directory
2.7 Security
2.8 Distribution lists
3
Types of body parts
3.1 Applicable body part types
3.2 Structure of voice messages
3.3 VM forwarding
4
Conversion between different
encoded information types
5
Naming and addressing in general
5.1 Directory names
5.2 O/R names
5.3 O/R addresses
6
Operation of the service
6.1 General
6.2 Message handling phases
7
Quality of service
7.1 Message status
7.2 Support by Administrations
7.3 Model of delivery and notification times
7.4 Message delivery time targets
7.5 Delivery notification time targets
7.6 Receipt notifications and non-receipt notifications
7.7 Error protection
7.8 Availability of service
7.9 Minimum storage
capacity
8
Tariff and accounting principles
9
Network requirements
10 User information and support
11 Use of the VM-service within CCITT defined telematic services
Annex A – Abbreviations
Annex B – Subscriber access
and terminal requirements
Annex C – VM elements
of service for 1984 systems
Annex D – Classification
of elements of service for Voice Messaging
Annex E – Definitions
of elements of service specific to Voice Messaging
Annex F – Classification
of elements of service specific to the telephone service access unit
Annex G – Secure voice
messaging elements of service
Annex H – Voice
messaging security overview