| 摘要 |
PURPOSE:To secure the simple test for the operation of the time-division switch by extracting the digital signal inserted into an optional time slot and then comparing the extracted digital signal with the original signal. CONSTITUTION:The time slot of the input/output time slots are designated through control part 1 and the numbers are stored into resisters 5 and 9 in case the connection is secured via time-division switch 2 between an optional time slot of the incoming side time-division multiple circuit and an optional time slot of the outgoing side time-division multiple circuit. Then the output signal of digital signal generation circuit 6 is inserted to the designated time slot, and at the same time signal extraction circuit 4 extracts the digital signal through the designated time slot. The collation is given at comparator 8 between the output signal of circuit 6 and the signal extracted via circuit 4. And in case the agreement is obtained between them, the operation of the time-division switch is decided normal. |
