If the LED indicator value on the SCC board of the OSN 8800 T32 board is 11, which of the following is the subrack ID?
A. Slave subrack 2
B. Slave subrack 1
C. Slave subrack 17
D. Slave subrack 11
Dispersion compensation is not required for 40Gbit/s and 100 Gbit/s coherent systems because the dispersion tolerance of coherent boards is large. NG WDM products do not support hybrid transmission of non-coherent and coherent networks.
A. True
B. False
Which of the following is the client-side logical port of a board in standard mode?
A. ODUkLP-n
B. RX/TX-n
C. ClientLP-n
D. n(Nn/OUTn)-OCH:1-ODUk:m-ODUp:q
Which of the following statements about Flexible ROADM is incorrect?
A. Improves spectrum utilization and meets the requirements for flexible scheduling in the 100Gbit/s era.
B. Flexible ROADM is compatible with existing networks.
C. The WSMD2 board supports the Flexible ROADM configuration.
D. The Flexible grid technology can flexibly set bandwidth and support flexible bandwidth allocation and scheduling.
Which of the following statements about ROADM is correct?
A. ROADM technology uses the NMS software to deliver configurations to implement the wavelength adding/dropping and pass-through status.
B. NG WDM equipment supports ROADM with fixed spectrum and Flexible ROADM with flexible spectrum.
C. ROADM can adjust the optical power of the pass-through wavelength and the added wavelength.
D. QandM personnel need to provide onsite support for wavelength adjustment at ROADM sites.
Which of the following is approximately equal to 100mw?
A. 13dBm
B. 20dBm
C. 15dBm
D. 10dBm
If no bit error test is performed on an optical channel for 10 minutes, the local end uses the SDH analyzer to connect to the client-side port on the OTU board, the client-side port on the opposite OTU board need to be self-looped by a fiber. In the case of self-loop, a fixed attenuator must be added.
A. True
B. False
Which of the following protection schemes require the APS protocol?
A. ODUk SPRing protection
B. ODUk SNCP
C. SW SNCP
D. 1:1 optical line protection
Which of the following statements about AU pointers are correct?
A. The root cause of the AU pointer justification is that the clocks of the upstream and downstream stations are not synchronized.
B. AU_PTR indicates the position of the J0 byte.
C. If the receive end detects that the H1H2 bytes are "1", the local end generates the AU-AIS alarm.
D. The value of the AU-PTR pointer is placed in the last 10 bits of the H1 and H2 bytes. Therefore, the valid value of the AU-PTR pointer is 0~1023.
Which of the following is not a precaution after board replacement?
A. Record the settings of jumpers and DIP switches on the board.
B. For functional units that have backups, check whether the switchover is normal.
C. Check the indicator blinking status of the board and ensure that the board works properly.
D. Ensure that no abnormal alarm.