| 摘要 |
<p>PURPOSE:To obtain the test controller for a transmission line in which the test is executed only with an alarm code without use of a specific test code. CONSTITUTION:This controller is provided with a test information transmission circuit 1 using alarm information ruled so as not to be mis-recognized as an alarm signal within an alarm protection time as test information and sending the information. Then a test information detection circuit 5 detecting the information and a test control circuit 3 controlling them to execute the test.</p> |
