TU-AIS is frequently encountered during network maintenance. Which of the following alarms can trigger the TU-AIS alarm? (Multiple Choice)
Answer(s): A,B,C,D
Which of the following is the function of TCM overheads in ODUk signals?
Answer(s): C
Outband networking requires higher costs than inband networking, but provides more reliable management channels.
Answer(s): A
Compared with a dense wavelength division multiplexing (DWDM) system, a coarse wavelength division multiplexing (CWDM) system provides a certain number of wavelengths and a transmission distance within ( ) km, which greatly reduces system cost and has strong flexibility.
Answer(s): B
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