| 摘要 |
<p>PURPOSE:To transfer an alarm for plural equipment, in the inter-equipment alarm transfer system for a transmission system in which plural repeaters are connected. CONSTITUTION:When an alarm takes place in its own station, a storage circuit 2 receiving an overhead signal 102 and an alarm state signal 105 outputs an alarm 103 stored for another equipment. An AIS generating circuit 4 receiving an output 103 of the storage circuit 2 and an alarm state signal 105 outputs an AIS signal 107 including the output 103 of the storage circuit 2. An AIS insertion circuit 5 receiving a main signal 101 and the AIS signal 107 inserts the AIS signal 107 to a signal other than the overhead signal 102 and outputs the result as a main signal 108. A selector circuit 6 selects an output 106 of a multiplexer circuit 3 as an output 109. An overhead insert circuit 7 insets an output 109 of the selector circuit 6 to the overhead part in the main signal 108.</p> |
