NO.196 The collection and storage of on-site data includes periodic collection during normal operation of the equipment and collection of equipment failures. Generally, before the fault is processed, the maintenance personnel must collect and save the field data.

• A. TRUE
• B. FALSE

NO.197 Which of the following options can reduce the effects of nonlinear effects in the WDM system? (Multiple Choice)

• A. Using high performance fiber
• B. Control optical power
• C. Dispersion management
• D. Advanced light source technology

NO.198 When the cross-board is configured with 1+1 hot backup, in the case of normal switching, the replacement of the cross-clock board does not affect the packet service.

• A. TRUE
• B. FALSE

NO.199 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. TRUE
• B. FALSE

NO.200 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. Set the OAU gain so that its output reaches the nominal value
• C. Improve the sending optical power of the originator
• 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.

NO.201 When creating an OCh trail by using the board method, the source/sink ports select the corresponding line board and the IN/OUT port of the FIU board.

• A. TRUE
• B. FALSE

NO.202 TEM28 is the Ethernet convergence tributary board. Which of the following descriptions about the TEM28 board are correct? (Multiple Choice)

• A. TEM28 can simultaneously access FE, GE, 10GE LAN and 10GE WAN services through different ports.
• B. The electrical signal can be output ODU0, ODU1flex, 00U1 or ODU2 signals to the backplane for cross scheduling through operations such as encapsulation mapping and OTN framing.
• C. The TEM28 board supports the L2 switch module and needs to configure the port to VCTRUNK service.
• D. RX1/TX1~RX4/TX4 ports are 10GE optical ports, which can handle 10GE LAN/10GE WAN services. Other interfaces are GE optical ports, GE electrical interfaces or FE electrical ports which can handle GE or FE services.

NO. 203 In the scenario where the non-convergence OTU processes OTN standard signals, both A and B are WDM sites. After receiving the OTUk_TIM alarm on the client side, the OTU board at station A sends the OTUk_BDI alarm to the upstream. When the TIM follow-up action is disabled, the alarm is no longer transmitted to the downstream. When the TIM follow-up action is enabled, an SF event is generated. The WDM side of the OTU board at station B reports the ODUk_PM_AIS alarm, and the ODUk_PM_AIS alarm is transmitted downstream. The client equipment reports this alarm. After the WDM side of the OTU board at station B receives the OTUk_TIM alarm and the TIM follow-up action is disabled, the alarm is no longer transmitted to the downstream. When the TIM follow-up action is enabled, an SF event is generated. After the client side of station B processes the SF event, the client equipment reports the ODUk_PM_AIS alarm.

• A. False
• B. True

NO. 204 In a WDM system, after a distance of transmission, the OSNR of the signals at the receive end decreases to a certain extent. Which of the following is the main cause?

• A. Use of Demultiplexer Multiplexer
• B. New optical fiber is not used.
• C. The fiber attenuation is too large.
• D. Use of EDFA

NO. 205 Which of the following is not included in an ASON network?

• A. TE Link
• B. SC
• C. ASON Domain
• D. ASON NE

NO. 206 Loopback is a common operation for routine maintenance and troubleshooting. Which of the following statements about loopback operations are incorrect?

• A. 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.
• B. After the outloop is performed, the signals are transmitted to the internal.
• C. After the inloop is performed, the signals are transmitted to the external.
• D. When performing a hardware loopback on an optical port, you need to add an optical attenuator.

NO. 207 The OSN 1800V supports the following packet protection features:

• A. PW APS
• B. Tunnel APS
• C. TPS
• D. LAG

NO. 208 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 optical power of the transmit-end OA board is out of the permitted range.
• C. whether the line loss compensation is out of the permitted range.
• D. whether the line loss exceeds the design end of life (EOL) value

NO. 209 Which of the following ROADM boards have WSS optical modules?

• A. RDU9
• B. WSMD9
• C. WSD9
• D. WSM9

NO. 210 Which of the following statements about the line fiber quality monitoring performance parameters is wrong?

• A. The pulse width of emitted optical pulses varies according to monitoring modes, and affects the detection distance and measurement precision. A greater pulse width provides a larger dynamic range, longer detection distance and better measurement precision.
• B. When the pulse width increases, the light emitting time increases and consequently a larger energy is obtained. This means that a larger dynamic range can be acquired but also larger dead zones will result.
• C. The total fiber loss will affect the detection distance and the dynamic range is fixed for the same detection mode. Therefore, a larger total fiber loss indicates a smaller detection distance.
• D. Measurement is performed multiple times within the detection time. The average value is obtained based on the measurement results to improve the measurement precision. The actual duration from the time when a detection event starts to the time when the detection results are returned will be longer than the Detection time.