The following description of the use of synchronous methods to create fiber optics, which is wrong?

Which of the following are limitations of the alarm and performance analysis methods? (Multiple Choice)

The OCh path is created using the single station method. After the creation is completed, the 0ch path is not searched. Which are the possible reasons? (Multiple choice)

The E-Line service types supported by the MS-OTN packet device are: (Multiple Choice)

When 10-minute error-free test is performed on a certain wavelength division channel, the local end uses the SDH analyzer to interconnect with the client-side interface of the OTU board. The peer OTU client-side interface needs to perform fiber self-loop. When you are self-looping, you must add solid decay.