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NEW QUESTION 56
The OD system monitors the main optical path performance in each optical multiplexing section (OMS),which of the following items are monitored?
- A. whether a fiber cut occurs on the main optical path.
- B. whether the line loss compensation is out of the permitted range.
- C. whether the optical power of the transmit-end OA board is out of the permitted range.
- D. whether the line loss exceeds the design end of life (EOL) value
Answer: A
NEW QUESTION 57
The following basic principles for fault location in WDM systems are (). (Multiple Choice)
- A. First single wave, followed by multiple waves
- B. First advanced, then low level
- C. First two-way, then one-way first
- D. First locate external and then location transmission
Answer: B,C,D
NEW QUESTION 58
MPLS APS is a network protection mechanism. It implements service switching by using the MPLS OAM detection function.
- A. True
- B. False
Answer: A
NEW QUESTION 59
The E&M signal defines the type of connection between a relay device and a signaling unit. Which of the following belongs to the relay device?
- A. Softswitch platform
- B. PBX
- C. Telecommunications Exchange
- D. E&M voice exchange
Answer: B
NEW QUESTION 60
Loopback is a common operation for routine maintenance and troubleshooting. Which of the following statements about loopback operations are incorrect?
- A. After the outloop is performed, the signals are transmitted to the internal.
- B. When performing a hardware loopback on an optical port, you need to add an optical attenuator.
- C. After the inloop is performed, the signals are transmitted to the external.
- D. The hardware loopback is performed by using the fiber jumper or self-loop cable to perform the loopback on the optical port or electrical port.
Answer: D
NEW QUESTION 61
Which of the following are the components of general package format of PWE3? (Multiple Choice)
- A. CW (Control Word)
- B. MPLS label
- C. Payload
- D. Type
Answer: A,B,C
NEW QUESTION 62
As with the STP device, the NG WDM device can practice the network element configuration on the network through pre-configured method.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 63
In the sub-(wave) characterization test, what kind of standard does the isolation test require?
- A. >20dB
- B. <25dB
- C. <20dB
- D. >25dB
Answer: D
NEW QUESTION 64
The main light path monitoring is based on the OMS segment and it mainly monitors which of the following items? (Multiple choice)
- A. The main light path is broken?
- B. The origin of the optical discharge power is abnormal
- C. Line attenuation exceeds the design EOL value.
- D. Line attenuation compensation is abnormal
Answer: A,B,C,D
NEW QUESTION 65
A, C are the WDM OTM stations, and B is the relay station. When the transmission direction of the A to B stations is interrupted, the Wavelength side of the B-stack OTU relay board reports the R_LOS emergency alarm and runs the processing to the upstream A.
The station side OTU2_BDI secondary alarm. At the same time, the alarm continues to be transmitted to the downstream station of the B station. After the alarm is processed at the C site, the ODU2_PM_AIS minor alarm is reported on the WDM side of the C-site OTU, and the ODU2_PM_BDI secondary alarm is transmitted back to the upstream station A.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 66
Since the nonlinear effect is generated, its influence on the service signal cannot be repaired. Therefore, the treatment of the nonlinear effect of the existing network is to avoid the occurrence of nonlinear effects.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 67
The following description of 1+1 and 1:1 optical line protection, the fault is (). (Multiple Choice)
- A. 1+1 optical line protection and 1:1 optical line protection use the same protection board
- B. According to different placement of OLP boards in the network, 1+1 optical line protection can be divided into 1+1 OMS path protection and 1+1 OTS path protection.
- C. The main difference between 1:1 optical line protection and 1+1 optical line protection is whether the APS protocol is required.
- D. 1:1 optical line protection switching mode can only be double-ended switching
Answer: A,C
NEW QUESTION 68
Which of the following reasons may cause a business error? (Multiple choice)
- A. The tail wire connector is seriously polluted
- B. The temperature in the equipment room is too high
- C. The optical power of the incoming fiber is too high or too low
- D. Transmitting laser performance degradation of the originating OTU board
- E. Dispersion compensation is unreasonable, such as under- or over-compensation
Answer: A,B,C,D,E
NEW QUESTION 69
Which of the following description of the DM12 board are correct? (Multiple choice)
- A. Electrical signal input and output interfaces for DDN, Unframed E1 and sub-rate services
- B. One DX1 board can be used with two DM12
- C. Accessing G.703 64 kbit/s co-directional service signals through the DB44 interface on the DM12 board
- D. Access the NX6bit/s and sub-rate service signals through the DB28 connector on the DM12 board.
Answer: B,C,D
NEW QUESTION 70
Generally, in the NG WD system, the full-wave fiber input power is generally less than 20dBm. What is the main reason?
- A. To avoid nonlinear effects
- B. In order to extend the life of the laser of the board
- C. In order to maintain the personal safety of personnel
- D. In order to protect the cable
Answer: A
NEW QUESTION 71
The maximum optical power of light-emitting OBU output is 20dBm, which is used in the C-band 80 system. How much dBm should the single-wave standard output optical power be?
- A. +4dBm
- B. -2dBm
- C. +7dBm
- D. +1dBm
Answer: D
NEW QUESTION 72
In the WDM system, what is the reason for the fiber attenuation and bit error rate? (Multiple Choice)
- A. Fiber damage
- B. Fiber bending
- C. Fiber aging
- D. Fiber break
Answer: A,B,C
NEW QUESTION 73
Which of the following paths are not related to the business?
- A. Client
- B. OCh
- C. ODUk
- D. OSC
Answer: D
NEW QUESTION 74
Which of the following statements about replacing the SCC board is incorrect?
- A. If the software version of the new SCC board is later than equipment version, clear the database of the SCC board, and then downgrade the software on the SCC board to the same version as the equipment.
- B. In the case of the 1 + 1 hot backup of the SCC board, replacing the control board does not affect services when the active/standby switchover is performed.
- C. If the software version of the new SCC board is earlier than the equipment version, upgrade the software on the SCC board to the same version as the equipment.
- D. After the SCC board is removed, the BD_STATUS and COMMUN_FAIL alarms are reported. After the new board goes online, these alarms need to be manually cleared.
Answer: D
NEW QUESTION 75
When creating single station optical crossover, an error message "The direction of the cable is wrong selected" appears. The possible reason is?
- A. Lack of logic fiber between boards
- B. "Create reverse crossover" is not selected during configuration
- C. Device physical fiber connection error
- D. The network element management time is not synchronized.
Answer: B
NEW QUESTION 76
Which of the following statement is correct?
- A. Deactivation will delete the configuration of the U2000, which has no impact on the device side services.
- B. The optical layer path must be deleted first when the electrical layer path is removed.
- C. The optical layer path and the electrical layer path are independent. It is not necessary to delete the electrical layer path when deleting the optical layer path.
- D. When the OCh path exists, you can directly create a client path. The NMS automatically creates an ODUk path.
Answer: C
NEW QUESTION 77
The following description of the alarm, which is correct? (Multiple choice)
- A. OTUKAIS: OTUK alarm indication signal, the AIS signal is transmitted downstream, indicating that the upstream detected signal is invalid.
- B. OTUk-LOM: Multi-frame alignment signal abnormal alarm, multi-frame positioning processing continues the multi-frame out-of-synchronization (o0M) state for 3ms, generating OTUelom alarm.
- C. OTUKBDI: OTUk backwards indication alarm. When the signal detected by the SM segment fails, the value of the BDI byte is 1, and the alarm is reported.
- D. OTUK-TIM: The OTUK trace identifier is the TTI (Trail Trace Identifier) mismatch. This alarm is generated if the trace identifiers of the peer end and the local end do not match and the TIM detection is enabled during the control process. Compare the API (Access Point Identifiers) in the input signal with the desired API.
Answer: A,B,C,D
NEW QUESTION 78
When the optical cable between the FIU and the FIU fails, the optical layer alarm reported by the downlink site is (). (Multiple Choice)
- A. OSC_RDI
- B. R_LOS
- C. MUT_LOS
- D. OSC_LOS
Answer: B,C,D
NEW QUESTION 79
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