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In a scenario where non-convergence OTU boards process standard SDH signals, both site A and site B are WDM sites, and the R_LOS alarm is detected on the client side of the OTU board at site A. After an alarm is processed on the WDM side of the OTU board, the REM_5F alarm is reported on the client side of the downstream site B. Then, site B transmits the signals to its downstream client device and reports the R^LOS alarm to the client device.

A.

TRUE

B.

FALSE

When configuring 1+1 optical line protection, you can select RI1/TO1 or RI2/TO2 as the working channel based on our given context.

A.

TRUE

B.

FALSE

Which of the following statements about the PWE3 network reference model is false?

A.

A CE is unaware of whether it is sending/receiving an emulated service or a native service.

B.

By means of PWE3, point-to-point channels isolated from each other can be created, and users’ Layer 2 packets are transparently transmitted on a PW.

C.

A tunnel is a mechanism for transparently carrying information on a network. Tunnels are used to carry PWs, and each tunnel can carry only one PW.

D.

A PE is located at the edge of a carrier’s network and provides PWE3 for a CE.

SOTU represents a single-OUT interface, and MOTU represents a multi-OUT interface.

A.

TRUE

B.

FALSE

Which of the following features is used by a laser to coherently receive optical signals and restore the amplitude, phase, and state of polarization information from the received signals?

A.

Same oscillation direction

B.

Same amplitude

C.

Opposite oscillation directions

D.

Same frequency

In an OTN (80 wavelengths in full configuration), the input optical power of an amplifier ranges from -16 dBm to 4dBm. If 10 wavelengths pass through the amplifier, what is the nominal multiplexed-wavelength input optical power of this amplifier (the noise impact is not considered)?

A.

-16-10lg10+10lg80

B.

-16-10lg80+10lg10

C.

4-10lg10+10lg80

D.

/ 4-10lg80+10lg10