Regarding the M40 and D40 channel isolation indicators of OSN 8800/6800 devices, which of the following statements is correct? () (multiple choice)

• A.FIU's IN-TM and IN-TC isolation are both >40db
• B.The isolation of SFIU's LINE1-OSC1 and LINE1-OSC2 are both ≥65db
• C.D40 adjacent channel isolation> 22dB
• D.M40 adjacent channel isolation> 22dB
• E.M40 non-adjacent channel isolation> 25dB
• F.D40 non-adjacent channel isolation> 25dB

Comment: *

Name: *

Email: *

Verification: *

The optical power of one wave is 3dBm, and the optical power of the other wave is 5dBm. The total optical power after the two waves are combined is 3+5 = 8dBm

• A.TRUE
• B.FALSE

Comment: *

Name: *

Email: *

Verification: *

NE1 is connected to NE2. NE1 uses OptiX SDH equipment to use time slot of VC4:1:2. If the service can be activated normally, what is the VC12 time slot number required to use equipment from other manufacturers on the opposite end?

• A.1-1-2
• B.2-2-1
• C.2-1-1
• D.1-2-1

Comment: *

Name: *

Email: *

Verification: *

The PTN self-organizing network supports physical layer clock synchronization, IEEE 1588V2 clock and time synchronization, and IEEE 1588 ACR clock synchronization.

• A.TRUE
• B.FALSE

Comment: *

Name: *

Email: *

Verification: *

The maximum dispersion tolerance of an OTU board is 800ps/nm, so on G.652 fiber, the dispersion limited distance can be roughly considered as

• A.80KM
• B.10KM
• C.40KM
• D.60KM

Comment: *

Name: *

Email: *

Verification: *