The media gateway function, the call control functions, business functions, interconnection functions, business applications interface functions to support open authentication and authorization functions, accounting functions, resource control and management functions, protocols and interface functi

Access to the media gateway function, call control features, business, and provide the functionality and interoperability features support for the Open Business Application interface features, authentication and authorization functionality, the billing function, control of resources and administrati

The media gateway turning on function, the call control function, the provision of service function, the interconnection interworking function, supports the open service application connection function, the authentication and the authorized function, the cost function, the resources control function

Access media gateway function, call control functions, business functions, interconnection and interworking function, business application that supports open interfaces, authentication and authorization functions, charging function, resource control and administrative functions, protocols and interf

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