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Which of the following statements about a TNG2WSMD09 board aretrue? (Choose all that apply.)

A.

It implements optical-layer service grooming for multiple wavelengths.

B.

It is a reconfigurable optical add/drop multiplexing unit.

C.

It is a 9-port wavelength selective multiplexer/demultiplexer board (Super C band).

D.

It supports optical power adjustment and online optical power detection.

After GE services enter the client side of an OUT board that supports Ethernet services, they are encapsulated into OTN or SDH signals by the signal processing module. The alarm signals are processed in the same way between encapsulation into OTN signals and encapsulation into SDH signals.

A.

TRUE

B.

FALSE

What is the networking mode of a parallel FOADM site?

A.

EX40+EX40

B.

EX40+ EMR8

C.

MR4+MR4

D.

EMR8+EMR8

When the TTI to be received at the PM layer is inconsistent with the TTI actually received at the PM layer, which of the following alarms will not be reported?

A.

ODUk_PM_LOF

B.

ODUk_PM_TTI

C.

ODUk_PM_TIM

D.

ODUk_PM_LOS

Modulation is a process where the information of a signal source is processed and added to a carrier to make the information suitable for channel transmission. It is a technology where a carrier changes with a signal.

A.

TRUE

B.

FALSE

Which of the following statements about trail deletion on the NMS is false?

A.

If a path is deleted from the NE layer, the WDM paths at both the network layer and NE side are deleted.

B.

Deleting a path at either the network or NE layer interrupts services.

C.

If a path is deleted from the network layer, only the WDM path at the network layer is deleted on the NMS.

D.

Deleting a path at the network layer does not interrupt services.

Drag the correct answer to the corresponding number in the picture.

Services cannot be automatically switched to the protection channel when the working channel of optical line protection is faulty. Which of the following are possible causes? (Choose all that apply.)

A.

The locking command is issued manually.

B.

The WTR time is too long.

C.

The protection group parameters are configured incorrectly.

D.

The protection channel us faulty.

Which of the following statements about user side interfaces and network-side interfaces of E-Line services are true?

A.

User-side interfaces are NNIs, and network-side interfaces are UNIs.

B.

User-side interfaces are Layer 2 ports, and network-side interfaces are Layer 3 ports.

C.

User-side interfaces are UNIs, and network-side interfaces are NNIs.

D.

User-side Interfaces are Layer 3 ports, and network side Interfaces are Layer 7 ports.

To prevent the optical power at the receive end of an OTU board from being excessively high, you must configure a fixed attenuator according to the actual optical power. The fixed attenuator is usually configured at the transmit end.

A.

TRUE

B.

FALSE