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Last Updated: Aug 27, 2026
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| Section | Objectives |
|---|---|
| Optical Transmission Network Fundamentals | - Basic Optical Communications Technology
|
| SDH, WDM, OTN and Ethernet Technologies | - SDH Technology Principles
|
| Routine Maintenance and Troubleshooting | - Routine Operations
|
| Transmission Network Products & NMS | - U2000 & Network Management
|
1. When bit errors are detected in the B2 byte, which of the following alarms is reported by the peer end?
A) RS-BBE
B) MS-FEBBE
C) MS-BBE
D) MS-AIS
2. Which of the following alarms does not trigger the AU-AIS alarm?
A) R-LOS
B) B2-EXC
C) AU-LOP
D) MS-AIS
3. The coherent receiver technology uses the local oscillator laser that has the same frequency as the received signals to perform coherent processing and recovers the ( ) information from the received signals. (Multiple Choice)
A) Frequency
B) Amplitude
C) Polarization state
D) Phase
4. The 1310 nm and 1550 nm transmission windows are low-loss windows. In DWDM systems, only the 1550 nm transmission window is used.
Which of the following is the major cause?
A) None of the above
B) The non-linear effect of the 1550 nm wavelength area is small.
C) The working wavelength flatness area of the EDFA is included in this window.
D) The 1550 nm wavelength area is applicable to long-haul transmission.
5. Some of the SNCP protection switching conditions are default, such as AU-AIS and TU-AIS. Others conditions are optional, such as HP-TIM and HP-SLM. The optional conditions can be flexibly set based on service levels.
A) TRUE
B) FALSE
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: C | Question # 3 Answer: B,C,D | Question # 4 Answer: C | Question # 5 Answer: A |
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