| 摘要 |
PURPOSE:To allow the device to cope with the order of incoming call by designing the incoming state display in the line state display corresponding to a line equipped with a key telephone set to identify the incoming order. CONSTITUTION:Figure shows the state of incoming from the line at a time from t1-t9 and the response when the number of lines is eight. When an incoming is given to the line 5 at the time t1, the incoming order 1st rank is stored in the line memory 5 at first. When the incoming comes to a line 3 at a time t2, the incoming 2nd rank is stored in the line memory 3 while keeping the line 5 as it is. When an incoming comes to the line 1 at a time t3, the incoming 3rd rank is stored in the line memory 1 while keeping the line memories 5, 3 as they are. When any key telephone set responds to the line 5 at a time t4, the line memory 5 is busy, the incoming rank 2 of the line memory 3 is changed to ''1'' and the incoming rank 3 of the line memory 1 is changed to ''2'' respectively. When an incoming comes to a line 7 during that time, the incoming rank 3rd is stored in the line memory 7. |
