The packet protection features supported by the OSN 1800V include _______. (Multiple choice)

• A.Tunnel APS
• B.TPS
• C.LAG
• D.PW APS

Comment: *

Name: *

Email: *

Verification: *

For the wavelength division system, configure the 1st-20th wave, use the NS4 single board, and test the M40 output port with the spectrum analyzer during the commissioning. It is found that the optical power of the 20th wave is significantly lower than the other 19 waves. The possible reasons are as follows: (Multiple Choice)

• A.The 20th channel corresponding to the M40V has a large insertion loss.
• B.The 20th wave OTU's RX port is incorrectly added with 5dB fixed light decay.
• C.The 20th wave OTU wave side light is too small
• D.The 20th wave OTU center is long drifted

Comment: *

Name: *

Email: *

Verification: *

Which of the following monitoring boards do not support 1588v2 signal processing and transparent transmission?

• A.AST2
• B.SCI
• C.ST2
• D.SC2

Comment: *

Name: *

Email: *

Verification: *

ESC can also be used at OLA sites.

• A.False
• B.True

Comment: *

Name: *

Email: *

Verification: *

The maximum output optical power of an OBU board is 20 dBm, when it is used in a C-band 80-channel system, what is the standard per-channel output optical power?

• A.+ldBm
• B.-2dBm
• C.+4dBm
• D.+7dBm

Comment: *

Name: *

Email: *

Verification: *