In ROADM, which of the following levels of OTN paths do not need to be manually configured, and can be obtained directly through path search? (Multiple choice)

For a point-to-point network, set the TIM mode on the network management system to path terminal sink "only compare DAPI".

The special fiber input power (low power) is the fiber input power lower than the main fiber input power. The main purpose is to reduce what factor?

The OLT mainly plays the role of () in the combined networking mode of OLT+ONU, so the OLT equipment is required to have better performance and be able to provide sufficient bus bandwidth

Which of the following data is the data that needs to be collected and saved when a fault occurs? (Multiple choice)