2)Through the separation of service and call control, as well as call control and bearer, the service-independent architecture is implemented, which makes services independent of network.
3)NGN is a kind of open and integrated network architecture.
4)NGN is a kind of brand-new network integrating voice, data, fax, and video services.
Characteristics of NGN
Characteristics of Next Generation Network:
Open and distributed network architecture
NGN adopts the hierarchical architecture, which is divided into media access layer, transport layer, control layer and service/application layer.
Independent network control layer
Internetworking and gateways
NGN is based on standard protocols and packet switching network
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