| 摘要 |
<p>PURPOSE:To execute a diagnosis of a channel board and a channel path of a subscriber's line carrier equipment without using an exclusive terminal in the outside. CONSTITUTION:When channel data 22 of the own unit detected from a receiving PCM signal 21 is IDLE, test data is transmitted to a channel data inserting circuit 6 by a test data transmitting circuit 5. Also, by checking whether the channel data received at the time of IDLE coincides with the test data or not by a data check circuit 3, a diagnosis of a channel board and a channel path can be executed at the time of regular operation without using an exclusive equipment in the outside.</p> |
