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NS4 is a 100G line service processing board. In the following description of the NS4 board, which is wrong?

NS4 is a 100G line service processing board. In the following description of the NS4 board, which is wrong?
A . The wavelength of the optical signal on the wavelength division side is adjustable within the 80-wave range of the C-band 50GHz interval.
B . The MS4 board does not support the ODUI service crossover with the ND2 board through the centralized crossover bus
C . Support 80 channels of ODU0/ODUflex or 40 channels of ODU1 or 10 channels of ODU2/ODU2e or 2 channels of ODU3 or 1 channel of ODU4 signals and cross-board to realize the cross dispatch of services.
D . It can be used in electrical relay station to realize the electrical relay function of corresponding optical signal.

Answer: D

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