| 摘要 |
PURPOSE: A method for displaying bill information using an ISDN(Integrated Services Digital Network) is provided to display details about terminal usage to a user by using bill information of a transmitting portion. CONSTITUTION: A user selects a terminal usage account display mode(S10). A timer is operated according to the user's selection and the terminal usage account is displayed(S11). A predetermined key selection decision process is performed by determining whether the user selects a predetermined key for displaying the next terminal usage account, or not(S12). A selecting state of a release key is checked if the user selects the predetermined key for displaying the next terminal usage account(S13). An ending state of the timer is checked if the user selects the release key(S14). The terminal usage account display mode is released if the timer is finished(S15).
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