Last Updated: Jun 03, 2026
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1. Are the following statements about the definition of SDH correct?
A) Hierarchical structures available for asynchronous digital transmission
B) A hierarchical structure of standardized digital signals that can be multiplexed asynchronously
C) A hierarchy of standardized digital signals that can be cross-connected asynchronously
D) Complete standard digital signal hierarchy, providing synchronous digital transmission, multiplexing and cross-connection
2. In a 25GMSP ring consisting of four MSTP sites, which of the following statements about alarm reporting are correct when protection switching occurs?
A) APS-INDI alarm is reported on the XCS board
B) PS alarms are reported on the tributary board
C) Report APS-INDI alarm on the system control board
D) Report APS-INDI alarm on the board
3. Pointer adjustment is related to which of the following?
A) Rate
B) Expenses
C) Scrambling
D) Clock
4. Which of the following descriptions about the TNG2M 402D board is wrong?
A) Support ASON function of optical layer
B) Dual-channel 100 Gbit/s wavelength conversion board
C) M402D can realize the wavelength division side optical signal in the extended C band 50GHz interval
96 wavelength range domestically adjustable
D) Support ODUk SNCP protection and client side 1+1 protection
5. Forced switching, fiber switching, manual switching and motion switching are in descending order of priority.
A) False
B) True
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: A | Question # 3 Answer: D | Question # 4 Answer: A | Question # 5 Answer: B |
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