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Huawei Certified Internetwork Expert-Transmission Sample Questions:

1. The following is wrong about the position of the dispersion module in the signal flow.

A) If there is an OAU board, DCM is placed between OAU's TDC/RDC
B) The OTM station usually pre-fills 20KM DCM before sending OBU
C) If there is only one OBU board, the DCM is placed after the OBU
D) If there are two OBU boards, the DCM is placed between the two OBUs

2. The optical amplifier unit can make up for the line loss and increase the transmission distance. The transmission distance of the system can be extended to infinity through the multi-stage cascade method.

A) FALSE
B) TRUE

3. For back-to-back OTM sites, three new relay wavelengths are added. The schematic diagram is as follows. The following statement is wrong

A) There is no need to adjust the input optical power of the optical amplifier board
B) No need to adjust the VOA on the wave
C) No impact on business on OTM site
D) No need to adjust the VOA on the repeater wavelength

4. The single-fiber bidirectional optical interface of PTN equipment distinguishes upstream and downstream service flows according to time slots.

A) FALSE
B) TRUE

5. The following are not precautions for preliminary testing:

A) Prepare cotton swabs and alcohol, and pay attention to the cleaning of the connector at all times when testing the optical interface characteristics to ensure the accuracy of the test data.
B) When performing a 24-hour bit error test, ensure that the entire test process is free from external interference (including human factors and power supply conditions, etc.). If there is an abnormality, the exact time of the abnormality should be recorded or the test should be repeated. The test time does not need to exceed 24 hours.
C) When testing, be careful not to look directly at the optical transmitter interface, so as not to damage your eyes.
D) Before the test, check whether the required test wires are complete, the type of connector and the applicability of the instrument and whether the connection is good.

Solutions: