| 摘要 |
PURPOSE:To enable a ring-down incoming to connect to a prescribed extension group, by selecting an idle extension that is previously stored. CONSTITUTION:When a ring-down incoming trunk CICT has an incoming call, the incoming call is informed to a controller CONT via a scanning circuit TSCN. The controller CONT starts the monitor for the scanning point after identifying the incoming trunk is equal to the CICT. Then the call signal given to the trunk from a counter station is transmitted to the CONT via the TSCN. Thus the CONT identifies the incoming call to the CICT, and as a result, an indoor extension of the ring-down incoming enable extension groups which are stored previously in a storage device MM is selected. Then a call is executed through a call signal trunk RGT. |
