| 摘要 |
PURPOSE:To attain complete switching diagnose by setting a test pattern to a transmission signal memory for operational system and transmitting the test pattern after providing a return route respectively with operational system as well as stand-by system and checking the test pattern which is received by stand-by receiving signal memory. CONSTITUTION:The test pattern is set a SSM 7n at an ACT side and both the return path and return instruction are set at the ACT side and at the same time both the return path and its instruction are set at a SBY side. Then the test pattern which is set to a SSM 7n at the ACT side is sent to a RSM 4s at the SBY side through following order; SSM 7n, ACT side dropper 12n, ACT side return route, ACT side inserter 11n, ACT side primary time division switch 1n, ACT side space division 3s, SBY side secondary time division switch 2s, SBY side dropper 12s, SBY side return route, SBY side inserter 11s, SBY side. Furthermore the following operation condition; space division switch 3s, SBY side secondary time division switch 2s dropper 12s is diagnosed after checking the test patterns inputted into the RSM 4s, SBY side. |
