H31-341_V2.5 무료 덤프문제 온라인 액세스

WDM systems generally use DCMs to compensate for chromatic dispersion. Which of the following statements about DCM-based dispersion compensation is false?

• A.Compared with line transmission optical fibers, DCMs are prone to non-linear effects. Therefore, the incident optical power of the DCMs must be controlled.
• B.For a 10G system with a fiber length shorter than 400 km, G.652-specific DCMs can be used to compensate for dispersion in G.655 (Leaf) optical fibers.
• C.If the DCM configuration is false, the receive-end performance will deteriorate.
• D.If the DCM configuration is incorrect, the system OSNR will deteriorate.

OTUk_LOM is an alarm indicating that the frame alignment signal (FAS) is abnormal. This alarm occurs when the frame alignment processing is out of frame (OOF) for three consecutive milliseconds.

• A.FALSE
• B.TRUE

Optical power is an Important indicator of a WDM system and directly affects the transmission distance of signals. Therefore, the output optical power of a site must be as high as possible to ensure that signals can reach the peer site.

• A.FALSE
• B.TRUE

In an OTN (80 wavelengths in full configuration), the input optical power of an amplifier ranges from -16 dBm to 4dBm. If 10 wavelengths pass through the amplifier, what is the nominal multiplexed-wavelength input optical power of this amplifier (the noise impact is not considered)?

• A.4-10lg10+10lg80
• B./ 4-10lg80+10lg10
• C.-16-10lg80+10lg10
• D.-16-10lg10+10lg80

Which of the following statements about incident optical power commissioning are true? (Choose all that apply.)

• A.If the output optical power of the downstream OA still does not meet requirements, increase the gain of the downstream OA.
• B.If the output optical power of the downstream OA meets requirements in the case of the minimum pain, the upstream incident optical power cannot be lower than the incident optical power counters.
• C.If the output optical power of the downstream OA does not meet requirements in the case of the minimum gain, reduce the attenuation value of the upstream EVOA first to a value within the range required by incident optical power counters.
• D.By default, the incident optical power of each optical fiber is the special incident optical power (high power).