| 摘要 |
A method of call screening comprising receiving a call to a subscriber directory number, determining a calling directory number of the call, checking a first list of calling directory numbers to be affected by a screen and a second list of times during which said directory numbers are to be blocked or permitted through the screen to determine whether a call incoming from the calling directory number should be blocked at a real time contained within the times, and completing the call to a line associated with the subscriber directory number in the event the call is not to be blocked at the real time of the call.
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