If the intermediate flatness method is used, the objective of single-wavelength optical power adjustment at the transmit and receive ends is to ensure that the flatness of the single-wavelength input optical power is within the range of the nominal single-wavelength input optical power ( ).

Optical layer overhead alarm detection is implemented through optical layer overhead OOS. The R_LOS and MUT_LOS alarms are optical layer alarms and therefore are reported based on OOS detection.

The OTUk frame rate can be concluded based on OTU1, OTU2, and OTU3 frame rates. Which of the following is the correct formula for calculating the OTUk frame rate?

When a GE service is encapsulated into an OTN frame structure and an SDH frame structure, the alarms reported by client-side devices are different.

When the R_LOS, R_LOF, R_OOF, or MUT_LOS alarm is reported on a device, services are interrupted.

The receiver of an OTU board is an avalanche photodiode (APD). Which of the following is within the input optical power range?

If the mask of an IP subnet is 27 bits, how many hosts does the subnet have?

What is the networking mode of a parallel FOADM site?

The OTUk_LOM alarm is generated when the out of multiframe (OOM) state lasts for 3 ms.

The OptiXtrans DC908 chassis can be a DC chassis or an AC chassis.

QPSK modulation reduces OSNR requirements and fiber non-linear effects, and Improves dispersion tolerance and PMD tolerance.

When the TTI to be received at the PM layer is inconsistent with the TTI actually received at the PM layer, which of the following alarms will not be reported?

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If a trail trace identifier (TTI) in the section monitoring (SM) layer is abnormal, the _____ alarm will be reported. (Enter only letters and special characters.)

In an OA-free system, the lower threshold of the receive optical power of a line board or the WDM side of an OTU board Is the optical module's receiver sensitivity plus 3 dB.

If a DCM is configured in a system, the input single-wavelength optical power of the DCM must be lower than or equal to ( ) dBm.

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ODUk SNCP has three subtypes: _____, ______, and _____. (Enter the acronyms in uppercase letters.)

The single wavelength incident optical power of a 100G system is lower than that of a 10G system. When 100G channels are expanded In a 10G system, the OA gain can be reduced to decrease the single-wavelength output optical power of the OA to meet the incident optical power requirements.

The core component of ROADM is a wavelength selective switch (WSS).

Wavelength division multiplexing (WDM) refers to a technology that transmits optical signals at____over one optical fiber. (Enter only lowercase letters.)

Match the site type with the corresponding function description.

Modulation is a process where the information of a signal source is processed and added to a carrier to make the information suitable for channel transmission. It is a technology where a carrier changes with a signal.

Which of the following statements about port priorities in the LAG setting scenario are true?

On a WDM network, if OA and OSC board in two directions report optical loss alarms, which of the following is the most likely cause?

Which of the following statements about LSP is false?

A VOA is configured on each wavelength path of a WSS board to adjust the____of optical signals to achieve flatness adjustment. (Enter only lowercase letters.)

What are characteristics of ROADM networking?

Generally, which of the following operations will interrupt services on live networks?

A common WDM service can be converted into an ODUk SNCP service. However, an ODUk SNCP service will be interrupted when it is converted into a common WDM service.

Signal flow analysis is used to check the service flow of a faulty WDM system node by node to locate the fault.

The EDFA amplifies service signals and brings noise to the system. It is the main source of noise.

The nominal rate of OTU4 signals is 111,809,973.568 kbit/s. Generally, the line rate is regarded as 112 Gbit/s.

For a 100 Gbit/s signal, the baud rate of the data is actually 25 Gbaud/s (100 ÷ 2 ÷ 2=25).

In an OA system, the lower threshold of the receive optical power of a line board (with a PIN receiver laser) or the WDM side of an OTU board is the optical module's receiver sensitivity plus 5 dB.

After GE services enter the client side of an OUT board that supports Ethernet services, they are encapsulated into OTN or SDH signals by the signal processing module. The alarm signals are processed in the same way between encapsulation into OTN signals and encapsulation into SDH signals.

When a member port is added to or deleted from a static LAG, LACP must be started.

TDM PWE3 is also called the CES service carried by PWE3. It supports SAToP and CESoPSN modes. Which of the following statements about the two emulation modes is false?