In the deployment or expansion scenario, alarm reversal can reverse the alarm state and reduce a large number of unnecessary alarm reports. Which of the following descriptions about alarm reversal is correct?

Among the GSCC single boards of the following versions, which supported by the CF card?

Which of the following statements are correct? (Multiple choice)

For a point-to-point topology, it is necessary to set the TIM detection mode on the network management system to "only compare DAPI at the end of the path".

ITU-T stipulates, what is the switching gain requirement of the Raman amplifier equal to how many DB?