What should I pay attention to when commissioning a 100G and 10G hybrid transmission system? (Multiple Choice)

• A.In order to accurately measure the optical power of 100G wavelength, it must be debugged using a spectrum analyzer or a MAC card.
• B.For a hybrid transmission system with dispersion compensation, the dispersion compensation requirements are consistent with the requirements in a 10G non-coherent system.
• C.Pay attention to the mixed spectrum. The spectrum of the 100G signal is wider and looks lower than the 100G signal in the spectrum, but the actual optical power is equivalent.
• D.The optical power of the 100G signal is recommended to be higher than the optical power of the 10G signal, but not higher than the single-wave nominal value of the optical panel.

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Which of the following description of the performance parameters of line fiber quality monitoring is wrong?

• A.Line fiber quality monitoring function increases the monitoring accuracy by adding the averaged results to the average. The actual time required from the start detection to the software returning the test result will be greater than the "detection time" is set.
• B.Increasing the pulse width increases the duration of the laser emission, which increases the energy injected, allowing for a larger dynamic range, but an increase in pulse width results in a larger dead zone.
• C.The total loss of the fiber will affect the actual detection distance. The dynamic range of the same detection mode is fixed. The larger the total loss of the fiber, the smaller the distance that can be detected.
• D.Different modes of light pulse width are different in detection, pulse width affects distance accuracy and monitoring distance. The larger the pulse width, the larger the dynamic range, the longer the test distance and the higher the range measurement accuracy.

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Which of the following description of the extended ECC is correct? (Multiple Choice)

• A.The scale of the extended ECC network (the sum of the server and the client) must not exceed 8.
• B.Extended ECC recommends to use manual basis, which reduces mutual negotiation between network elements.
• C.In the automatic extended ECC mode, you need to connect the Ethernet ports of the two NEs with a direct-connected network cable (or a standard network cable through B), extend the ECC, and specify the server and client.
• D.Extended ECC is divided into automatic extended ECC and manual extended ECC. One network element can only support one mode at the same time. These two methods cannot be directly docked.

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When the board detects that the error rate of the regenerator section signal exceeds 10 by detecting the B1 byte, the B1_SD alarm is reported.

• A.FALSE
• B.TRUE

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Which of the following statement about the MPLS-TP OAM level is correct?

• A.Section is the service layer of PW, PW is the service layer of Tunnel, and Tunnel is the service layer of Service.
• B.Section is the service layer of the tunnel, Tunnel is the service layer of the PW, and PW is the service layer of the Service.
• C.Service is the service layer of the PW, PW is the service layer of the Tunnel, and Tunnel is the service layer of the Section.
• D.Tunnel is the service layer of PW, PW is the service layer of Service, and Service is the service layer of Section.

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