| 摘要 |
PURPOSE:To display to the telephone set with a displaying function by reading a displaying pattern indication information from the displaying pattern indication information memory device, selecting one pattern stored in the displaying information memory circuit by the read displaying pattern indicating information and determining the displayed condition information. CONSTITUTION:A central control unit 2 displays the condition information of the call at a certain extension telephone set 6 and then, first, the displaying pattern number at that time of the extension telephone set 60 is read from a displaying pattern indication information memory circuit 40 by referring to the extension telephone number. Next, the central control unit 20, based upon the read displaying pattern number, reads the displaying information corresponding to the displaying pattern number from a displaying information memory circuit 30 and determines the condition information to be displayed at a display 60a of the extension telephone set 60. An extension interface circuit 50 is controlled and the condition information is displayed at the display 60a. |
