Which of the following descriptions about the commissioning of the hybrid transmission system of 100G and 10G is wrong?

• A.In the scenario of non-coherent live network expansion and 100G coherent mixed transmission, the OSNR tolerance of 100G wavelength and the non-electric relay transmission distance can be improved by reducing the optical power of the input fiber
• B.To expand the 100G channel capacity of the 10G system on the existing network, the dispersion compensation type needs to be adjusted
• C.Pay attention to the mixed transmission spectrum, the spectrum of the 10G signal is relatively wide, and it looks lower than the 10G signal in the spectrum, but the actual optical power is equivalent
• D.100G is a coherent system, and 10G is a non-coherent system. Mixed transmission needs to set an isolation zone

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OSN1500/2500/3500/7500 supports DC and AC power input.

• A.True
• B.False

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Which of the following descriptions about ODUk_PM_BDI is correct?

• A.ODUk PM signal degradation
• B.ODUk PM open connection indication
• C.ODUk PM segment BIPS bit error limit exceeded
• D.ODUk PM backward defect indication

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Which of the following subracks does not support the configuration of grouping boards?

• A.OSN 9800 P18
• B.OSN 8800 T16
• C.OSN 1800II
• D.OSN 1800V

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FXO port provides feed, ringing, overvoltage/overcurrent protection, line monitoring, codec, 2/4 wire conversion and test, a total of 7 functions, referred to as BROSCHT.

• A.True
• B.False

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