When the optical cable between FIU and FIU fails, the optical layer alarm reported by the downstream site is (). (Multiple choice)

Failed to create a Client path using the path method, which of the following are the possible reasons? (Multiple choice)

The optical monitoring channel is set up for the monitoring of WDM optical transmission systems. ITU-T recommends that 1510nm wavelength be used first. Which of the following is the recommended rate?

The single-fiber bidirectional WDM system only uses one optical fiber to transmit optical signals in two directions at the same time. The optical signals in the two directions should be aligned at different wavelengths.

The power SCADA business and communication interface of the power supply system is the () interface