OPTIMIZED USER INTERFACE FOR ADVANCED CALL CONTROL FUNCTIONS ON TOUCH-SCREEN BASED VIDEOPHONE, AND CALL STATE CONTROL METHOD USING ITS USER INTERFACE

摘要

PURPOSE: An optimized user interface for advanced call control functions on a touch-screen based videophone, and a call state control method using a user interface thereof are provided to integrate and manage a high quality call control function by providing a conditional call transfer function and a 3-way call function. CONSTITUTION: When an idle state(1) is transited to a videophone call state, a hold button and a transfer button are displayed on a screen. If a state(2) during first video phone call is transited to a videophone hold state, a resume button and a call button are displayed on the screen. When a first videophone call hold state is transited to a first or second videophone resume state, the hold button and a switching button are displayed on the screen.