The OptiXtrans DC908 chassis can be a DC chassis or an AC chassis.

• A.TRUE
• B.FALSE

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OTUk_LOM indicates an abnormal alarm of the frame alignment signal. If the frame alignment process is in the out-of-frame (OOF) state for 3ms continuously, this alarm is generated.

• A.True
• B.False

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Compared with traditional SDH and SONET equipment, which of the following advantages does OTN have? (Multiple choice)

• A.Meet the transmission bandwidth requirements of each optical Tb/s through the wavelength division function
• B.Provide up to 5 levels of nested heavy barbaric TCM connection monitoring
• C.Provide 2.7Gb/s, 10.7Gb/s, 43Gb/s and even 111.8Gb/s high-speed interface
• D.Support special virtual concatenation transmission mode to improve and optimize the network structure
• E.Provide powerful out-of-band FEC function. Effectively guarantee the line transmission performance

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