As a user input to the terminal, network, and service in the control process, the user input tends to change the state of the terminal, network, or service to access and control telecommunication services.
As a user input to the terminal, network and service of the control process, the user input tends to change the state of the terminal, network or service to access and control the telecommunication service.<br>
As the user input of the control process to the terminal, network and service, the user input tends to change the state of the terminal, network or service to access and control the telecommunication service.