QUESTION: 41

The 1310 nm and 1550 nm transmission windows are low-loss windows. In DWDM systems, only the 1550 nm transmission window is used. Which of the following is the major cause?

The working wavelength flatness area of the EDFA is included in this window.
The non-linear effect of the 1550 nm wavelength area is small.
The 1550 nm wavelength area is applicable to long-haul transmission.
None of the above

Answer(s): A

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QUESTION: 42

When the LCAS function is used/ which of the following overhead bytes are used to transmit control information? (Multiple Choice)

Answer(s): B,D

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The pointer is used for alignment and indicates the start position of VC-n in the corresponding AU or TU frame. In this way, the receive end can correctly remove the corresponding VC from the STM-N, and then split the VC and C encapsulation to separate low-rate signals, such as PDH. That is, low-rate tributary signals can be directly dropped from the STM-N signal.

TRUE
FALSE

Answer(s): A

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QUESTION: 44

Which of the following statements about the MST functional module are correct? (Multiple Choice)

The MST is both the source and sink of the MS.
The MST implements the BIP-8 statistics calculation of the B2 byte.
The MST returns bit error information, but not the specific number of bit errors.
The MST provides the E2 orderwire channel.

Answer(s): A,D

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