| 摘要 |
To effectively collecting information necessary for maintenance of the optical transmission system from each optical repeater equipment, in an optical transmission system of the wavelength division multiplexing type according to this invention, a repeater unit 210-1 in optical repeater equipment 200 detects the wavelengths of optical signals lambda 1 to lambda q', the directions of optical signals, the transmission line ID Nos., and so on by using an optical couplers 211, 219, demultiplexers 212, 213, O/E converters 214-1 SIMILAR p, 215-1 SIMILAR q, and local oscillators 216-1 SIMILAR p, 217-1 SIMILAR q, and a supervisory control signal, including information about the detection results and a light amplifier 218, is sent to optical terminal equipment 100. |
