Question 46
Which of the following options are low-loss areas of single-mode optical fiber? (Multiple choice)
Question 47
On the two-fiber bidirectional multiplex section protection ring, the first half of the VC-4 of each STM-N line is the working channel, and the second half of the VC-4 is the protection channel.
Question 48
Which of the following are not passive optical devices? (Multiple choice)
Question 49
Which logical function block generates the R-LOS alarm?
Question 50
Which of the following is photolayer tracking? (Multiple Choices)