| 摘要 |
PURPOSE:To increase the monitoring service of an attendant board, by making different the incoming display for an attendant board in charge and for that not in charge to an incoming call request of attendant board from an open call, in a main trunk attendant board of an automatic exchanger. CONSTITUTION:In an automatic exchanger having two or more attendant boards, when an incoming call is given to a sttendant board ATT 1 from a main trunk, an extension is called from the ATT 1 and the extension and the main wire trunk are connected, and the ATT 1 is disconnected and the call is opened. In this case, the number of the attendant board in charge handled the call is stored in the area of a control memory M corresponding to the main wire trunk. When the attendant board recall request is given from the extension, the attendant board is checked based on the stored number in the memory M, and different incoming display is made as a recall incoming lamp control circuit A for the attendant board ATT 1 in charge and a recall incoming lamp display control circuit B for ATT 0, ATT 2- n not in charge. |
