| 摘要 |
PURPOSE:To improve the line test capability and faulty cause retrieval capability of a line test board and by monitoring a signal of an incoming line and a signal of an outgoing line at the same time to one call to grasp easily to which stage call processing is progressed. CONSTITUTION:A test mode and a line name of an incoming line are designated from an input device, the incoming line is acquired by an incoming trunk 2 and an exchange switch 3 and a monitor signal of the incoming line and a selection signal outputted from the incoming trunk 2 and an incoming register 4 are displayed on a display device 1 via an incoming memory 5 as the call processing operation is progressed. When the call processing is progressed and the outgoing line is selected, the connection path between the incoming and outgoing sides is searched, and a titled such as a name of the outgoing line outputted from an outgoing sender 6 and detected at the search and the monitor signal and the selection signal of the outputing line fed from an outgoing trunk 7 are fed to the display device 1 via an outgoing memory 8 and displayed. Then the signal monitor of both the lines is displayed continuously and if there is any change, it is displayed sequentially. |
