| 摘要 |
PURPOSE:To shorten a time, which is needed for collection, and to reduce the number of supervising devices by inserting supervising data in each repeating station to receiving data, and transmitting data. CONSTITUTION:Plural repeating stations 100 are set on an optical transmission path and in each repeating station 100, the supervising data to be outputted from a supervising means 121 are inserted to the data, which are received by a receiving means 111, by an inserting means 131 and sent from a transmitting means 141. Accordingly, since the supervising data in each repeating station 100 are inserted to the receiving data and sent, the collection of the supervising data can be executed by data communication between terminal stations. Thus, the time to be needed for the collection can be shortened. Then, since the collection of the supervising data can be executed by collecting the data to be supplied to the terminal station, the number of the supervising devices can be reduced. |
