| 摘要 |
PURPOSE:To allow a subscriber to be called to recognize easily a number of a malicious call and to attain the selection of response to an incoming call, by modifying partly a call processing program of a telephone station, and equipping a number display device in the subscriber's equipment. CONSTITUTION:The subscriber to be called BSUB has a telephone set TEL, adaptor ADP and a changeover switch SW. An exchange station is provided with a subscriber circuit LC connected to the BSUB, time division digital exchange TDNW, channel control circuit SPC and a central processor CC and additionally with an incoming trunk ICT and an MFC signal incoming register MFCIR. When a call arrives, the adaptor ADP displays the caller's number of a call and activates a bell of a telephone set when the incoming call coincident with a registrated number in advance, and informs the incoming of the other calls by a prescribed informing means. |
