| 摘要 |
PURPOSE:To reduce the test time by testing the continuity of a time division channel in two-way at the same time. CONSTITUTION:Subscriber circuit relays 8, 9 are set so as to connect subscriber circuits 10, 11 and a test link 12 under the control of a central processing unit 1 at the continuity test of a time division channel. Oscillators 15, 16 and receivers 16, 18 are connected to the test link 12 through hybrid circuits 13, 14 under the control of a continuity test control circuit 19. The test link 12 is set so as to be connected to the hybrid circuit 13, the subscriber circuit test relay 8, the hybrid circuit 14 and the subscriber circuit test relay 9 by the control of the central processing unit 1 succeedingly. Thus, the oscillators 15, 17 are connected respectively to the receivers 16, 18 and the result of continuity test is reported to the central processing unit 1 and confirmed. |
