SL64 board is available for OSN 2500.

• A.False
• B.True

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LCK insertion takes precedence over AIS insertion. That is, if the user configures LCK insertion and the conditions for automatic AS insertion are met, the LCK is inserted.

• A.Error
• B.True

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Which of the following is the meaning of SFD in the Ethernet frame structure?

• A.start frame delimiter
• B.Payload
• C.Preamble
• D.Frame check sequence

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PDM uses a polarization beam splitter to divide the laser into two vertical directions: x and y.

• A.True
• B.Error

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The backplane has two 48V power cords, and each board gets two -48V power supplies from the backplane. After combining the power supply via diodes, the various voltages required for each component are obtained by means of a DC/DC power module and a linear mane swap.

• A.True
• B.Error

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