According to the conversion formula between mW and dBm, how much dBm is equivalent to 500 mW? (lg5
= 0.7)

• A.30
• B.32
• C.27
• D.43

Comment: *

Name: *

Email: *

Verification: *

Which of the following descriptions about optical layer scheduling is wrong?

• A.The FOADM site composed of optical multiplexing + optical demultiplexing units can support up to 2 directions.
• B.Directioned means that the wavelength up and down from the local can only be transmitted to a certain fixed direction.
• C.The core device of ROADM is WSS, which supports the control of optical signal power.
• D.Colorless means that any wavelength can go up and down through any port on the ROADM board, and the wavelength can be flexibly adjusted during service rerouting on the ASON network, thereby avoiding wavelength conflicts.

Comment: *

Name: *

Email: *

Verification: *

Which of the following descriptions about the function of the electrical layer overhead processing source are correct? (Multiple choice)

• A.OTUk is responsible for calculating BIP-8 and writing into SM, GCC0, FAS, MAFS, etc.
• B.ODUkP is responsible for calculating BIP-8, writing PM, GCC1/2 and other overheads.
• C.ODUkT calculates BIP-8 and writes it to TCMi.
• D.OPUk performs client signal mapping, frequency adjustment and rate adaptation in the sending direction.

Comment: *

Name: *

Email: *

Verification: *

After starting the extended SSM protocol, in addition to judging the clock quality level and priority, the clock ID will also be judged. After the network element receives the clock signal with ID, if it is judged that the clock signal is sent by the station, the source is considered unavailable. In this way, the network element can still recognize the clock signal sent by itself even after being transmitted by multiple stations, preventing the formation of a timing loop.

• A.True
• B.False

Comment: *

Name: *

Email: *

Verification: *

The OLT mainly plays the role of () in the combined networking mode of OLT+ONU, so the OLT equipment is required to have better performance and be able to provide sufficient bus bandwidth

Comment: *

Name: *

Email: *

Verification: *