The main light path monitoring is based on the OMS segment and it mainly monitors which of the following items? (Multiple choice)

The E&M signal defines the type of connection between a relay device and a signaling unit. Which of the following belongs to the relay device?

Which of the following methods does the networking and application of NG WDM include? (Multiple choice)

Which of the following description of the process for optimizing the line attenuation compensation anomaly is correct? (Multiple choice)

The NG WDM two-dimensional ROADM site can use the WSMD9 single board, and its signal flow is an optical signal that is connected to the main optical channel from the "IN" optical port. The RDU (ROADM Demix Unit) optical module broadcasts 9 identical optical signals, which are output from the "DM1~DM8" and "ECPO" optical ports respectively. One of the signals is localized by the splitter board, and the other eight signals are dispatched to the other eight directions. Each wave of the main optical channel is connected from the "EXPI" optical port. The multiplexed or single-wave optical signal that needs to be inserted locally is input through the "AM1"~"AM8" optical port.