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NEW QUESTION 119
In the WDM system, after a certain distance of transmission, the optical signal-to-noise ratio of the receiving signal will be reduced to a certain extent. What is the main reason?
- A. No new fiber is used
- B. Use of EDFA
- C. Fiber attenuation is too large
- D. Use of the splitter combiner
Answer: B
NEW QUESTION 120
When you delete a discrete service, you can first activate it. At this time, you can view the alarm. If there is no alarm such as PS or TU-AIS, it is a garbage service. If there is an alarm, the analysis is incorrect. You need to activate it immediately.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 121
The troubleshooting methods that can be used to separate external faults are:
- A. Loopback
- B. Meter Test
- C. Configuration Data Analysis
- D. Replacement
Answer: C
NEW QUESTION 122
The NS4 board features test includes: (Multiple choice)
- A. -20dB spectral width test
- B. Side mode suppression ratio
- C. Receive sensitivity
- D. Center wavelength test
Answer: A,B,C,D
NEW QUESTION 123
In the WDM networking design, as long as there are enough EDFA cascades to compensate for the loss of optical power during transmission. Then the system can transmit a long distance without restriction.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 124
When the input optical power of the amplifier at the receiving end OAU is lower than the nominal optical power, which of the following are wrong in the operation?
- A. Adjust the dimmable fading before the terminating amplifier to increase the input optical power of the amplifier
- B. Improve the sending optical power of the originator
- C. Set the OAU gain so that its output reaches the nominal value
- D. When the input optical power cannot be increased by adjusting the adjustable attenuator, the adjustable attenuation at the input of the amplifier is removed.
Answer: B
NEW QUESTION 125
The basic principles of STP device fault location are? (Multiple choice)
- A. First external, then transfer
- B. First low speed, then high speed
- C. First network, then network element
- D. First advanced, then low level
Answer: A,C,D
NEW QUESTION 126
When using the OSN8800 T32, if you want to set the ID number of the master and slave sub-racks, which board should be set?
- A. EFI2
- B. EFI1
- C. SCC
- D. EFI
Answer: B
NEW QUESTION 127
Which of the following is not a part of the ASON Control Protocol?
- A. IS-IS
- B. OSPF-TE
- C. RSVP-TE
- D. LMP
Answer: A
NEW QUESTION 128
Which of the following description of the ASON software structure is correct? (Multiple Choice)
- A. Intelligent optical network consists of three planes
- B. Intelligent software main application management plane
- C. The transmission plane refers to the traditional transmission network.
- D. Management plane mainly refers to upper management such as network management
Answer: A,C,D
NEW QUESTION 129
Which of the following functions is added to EX40 compared with X40?
- A. Monitors the optical power of a single channel.
- B. Supports optical-layer cross-connections.
- C. Fewer slots are occupied.
- D. More multiplexed and demultiplexed wavelengths
Answer: D
NEW QUESTION 130
Which of the following operating modes does the AT8 board support? (Multiple Choice)
- A. 2E2M
- B. Reverse 2E2M
- C. Reverse 1E1M
- D. 1E1M
Answer: A,B,D
NEW QUESTION 131
The shortcomings of traditional OTDR meters in measuring optical fibers are: (Multiple choice)
- A. Cannot be used for routine maintenance testing
- B. Need inbound measurement
- C. Manual interpretation is required, which requires high operator requirements
- D. Business will be interrupted during measurement
Answer: A,B,C,D
NEW QUESTION 132
After the signal of the standard Ethernet frame length of 64 Bytes is connected to the Ethernet board, if the QinQ function is enabled, what is the actual frame length of the signal inside the board?
- A. 68 Bytes
- B. 80 Bytes
- C. 84 Bytes
- D. 64 Bytes
Answer: A
NEW QUESTION 133
Which of the following description of the single station commissioning is wrong?
- A. In case of power failure, the contact board can be used without anti-static wrist or anti-static gloves.
- B. Single station hardware check is complete, make sure all power switches are in the off position
- C. If the input voltage of the equipment is not within the required range, suggestions for rectification should be proposed.
- D. It is strictly forbidden to plug and unplug the power plug and PIU board.
Answer: A
NEW QUESTION 134
What common methods for MSTP device fault location can be summarized as?
- A. One loopbacks, two board change, three analysis.
- B. One board change, two loopbacks, three analysis.
- C. One analysis, two board change, three loopbacks.
- D. One analysis, two loopbacks, three board change.
Answer: D
NEW QUESTION 135
The following description of the alarm, which is correct? (Multiple choice)
- A. 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.
- 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. 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.
- D. OTUKAIS: OTUK alarm indication signal, the AIS signal is transmitted downstream, indicating that the upstream detected signal is invalid.
Answer: A,B,C,D
NEW QUESTION 136
Which of the following description of the PM_BIP8 related alarm is correct?
- A. The PM_BIP8_DEG alarm indicates the PM segment signal degradation alarm in the ODU layer.
- B. The PM_BIP8_SD alarm indicates the PM segment signal degradation alarm in the OTU layer.
- C. The PM_BIP8_OVER alarm indicates that PM error amount has exceeded in the ODU layer.
Answer: C
NEW QUESTION 137
When creating an electric layer path, one RX/TX port can only establish a connection with one optical channel of the clientLP port.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 138
Which of the following alarms will trigger the optical line protection switching? (Multiple choice)
- A. POWER DIFF_OVER
- B. MUT_LOS
- C. R_LOF
- D. R_LOS
Answer: A,B
NEW QUESTION 139
Which of the following description of the principle of automatic protection switching of the standard SSM protocol are correct? (Multiple choice)
- A. According to the clock source priority table, the network element first selects the clock with the highest quality level from the available clock sources as the homologous source.
- B. If there are multiple clock sources with the highest quality level, the network element selects the clock with the highest clock priority as the synchronization source.
- C. The network element broadcasts the clock quality information and the clock source ID of the synchronization source through the downstream station between the S1 bytes, and notifies the upstream station that the clock quality from the local network element is "not available for synchronization" by the S1 byte in the direction of the synchronization source.
- D. The network element broadcasts the clock quality information of the synchronization source to the downstream site through the S1 byte, and notifies the upstream station that the clock quality from the local network element is "not available for synchronization" by the S1 byte in the direction of the synchronization source.
Answer: A,B,D
NEW QUESTION 140
The following description of the alarm, which is correct? (Multiple choice)
- A. 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.
- 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. 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.
- D. OTUKAIS: OTUK alarm indication signal, the AIS signal is transmitted downstream, indicating that the upstream detected signal is invalid.
Answer: A,B,C,D
NEW QUESTION 141
Daily equipment maintenance items, excluding:
- A. Check device sound alarms
- B. Check the fan box and clean the air filter
- C. Check the cabinet and board indicators
- D. Check the room temperature, humidity and cleanliness
Answer: B
NEW QUESTION 142
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