1
Scope
2
References
2.1
Normative
References
2.2
Informative
References
3
Definitions
4
Conventions
5
Prose
descriptions
6
Functional
model and service profile
6.1
Functional
model
6.2
Service
model
6.3
Service
profiles
7
Service
scenarios
7.1
Business
videotelephony service scenarios
7.2
Residential
videotelephony service scenarios
8
IP
videotelephony service requirements
8.1
User
requirements
8.2
Application
requirements
8.3
Security
requirements
8.4
Authentication
and accounting requirements
8.5
Interworking
and intercommunication requirements
8.6 QoS requirements