| 摘要 |
A call filtering device enables user to program only the telephone numbers from which they would like to receive calls, thereby eliminating nuisance calls and wrong numbers. The device may include a display for displaying the incoming number of a caller and for programming the unit and may also include a keypad. A SIM card reader may included, thereby enabling telephone numbers to be copied to the device's memory from a mobile phone address book. The device may be arranged to play back a programmed voice message informing callers that unsolicited calls are not accepted and may also include a PIN override feature enabling callers to contact the subscriber from an unrecognized telephone number by entry of a PIN. Call filtering may be performed according to user defined criteria such as time of day, selective barring or allowance only of numbers stored in an address book. |
