| 摘要 |
A method for appending a dialing prefix to a telephone number digit string which has been dialed from a calling party is provided which comprises the steps of storing the dialed telephone number digit string in a buffer, marking the telephone number digit string stored in said buffer to define the local line number, checking whether the dialing prefix and local line number provides a valid network address, determining a correct dialing prefix to reach the destination party, advising the calling party via a computer-generated audio message of the correct dialing prefix required to reach the destination party, appending the correct area code prefix to the local line number; and automatically connecting the call to a destination party. The dialing prefix can include 1+, 0+, area codes, international access codes, and foreign country and city codes. The caller can be prompted for manual input of the correct dialing prefix using the touch tone keypad, or the prefix can be appended automatically. The method can include the steps of advising the caller via a computer-generated audio message that a fee will be incurred for automatic placement of the call. In a second embodiment, the caller can dial a seven-digit number and select the desired geographic region from an audio menu. In a third embodiment for a telephone system having a single area code assigned to a plurality of regions, a method is provided by which calling party can dial a ten-digit number and select the desired geographic region from an audio menu.
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