| 摘要 |
PURPOSE:To reduce the load on an approval test of an equipped circuit and to shorten the necessary time, by switching and connecting a transmitting and a receiving circuit to channel terminals of two systems. CONSTITUTION:For an approval test of an outgoing trunk OGT, a central controller CC controls a selection switch SEL and a circuit changeover switch (t) to switch and connect the OGT to a testing trunk TST, setting channels P5 and P6. Then, the central controller CC drives a relay A in a testing device TSE to connect the transmitting circuit SND to a terminal PA and the receiving circuit DET to a terminal PB. Consequently, the testing device TSE confirms the normalcy of the OGT and reports that to the CC. Further, the CC operates a relay B to take a similar test. Thus, the CC only sets the channels P5 and P6 for a test of, for example, the OGT, and the need to select and acquire an originating sender, receiving register, etc., is eliminated. |
