Regarding the test items of IEEE 1588V2 time protection function, which statement is wrong?
A . On the OptiX OSN 8800, the active and standby states of the clock board and the cross-connect board are related to each other. During the switching test, it is recommended to switch only the cross-connect board or the clock board.
B. On the OptiX OSN 6800, the active and standby states of the clock board and the cross-connect board are related to each other. During the switching test, it is recommended to switch only the cross-connect board or the clock board.
C. Test the long-term stability of the time performance in PTP synchronous mode, and the output time performance should be within ±1us.
D. For the long-term jitter test in the physical layer synchronization mode, use a time analyzer with a GPS receiver to observe at the end node for more than 8 hours, and the test output time performance should be within ±1us.
Answer: B
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