| 摘要 |
PURPOSE:To attain ease of grasp of a retention state and to discriminate the processing of calls in the order of retention by displaying the retention display of retention calls subjected to retention by the operation of an attendant board by the numeral in an automatic exchange. CONSTITUTION:The attendant board 7 is provided with a numeric display device 8 at each handled call and a counter 10 to attain ''0'' display of corresponding digits n1-n6 of the numeric display device 8 depending on the retention of the attendant board 7. Corresponding counters n1-n6 are started and the counted value is set to the corresponding n1-n6 of the numeric display device 8 to display the retention time of the handled call. |
