| 摘要 |
PROBLEM TO BE SOLVED: To confirm the operation state and alarm display of an optical space transmitting device at a place that is away from the optical space transmitting device with a simple configuration by transmitting operation data about the transmitting and receiving operations of the optical space transmitting device to an information signal transmission line, also multiplexing it to a transmission light beam and transmitting it to another optical space transmitting device. SOLUTION: Status information and alarm information of an optical space transmitting device 10 are transmitted as a state signal to a network 14 as an information signal through a network interface part, also are multiplexed to a transmission light beam and are transmitted to a network 15 through an optical space transmitting device 11. Thus, it is possible for a user to know the status information and the alarm information of the device 10 installed at a remote place. Also, it is possible to control the transmitting and receiving operations not only of the device 10 but also of the device 11 by multiplexing an operation control signal transmitted from a control terminal 16 to the transmission light beam. |
