QUESTION 61
Which of the following statements about SDH interfaces is incorrect?

A. The STM-64 rate is 9953.28 Mbit/s.
B. The STM-4 rate is 622.08 Mbit/s.
C. The STM-16 rate is 2500.32 Mbit/s.
D. The STM-1 rate is 155.520 Mbit/s.

Correct Answer: C
QUESTION 62
Which of the following statements about OSC and EC monitoring technologies in a WDM system are incorrect?

A. ESC information is transmitted together with service signals, without occupying extra wavelength resources.
B. When the OA board fails, OSC signals also fail.
C. At an OLA site, the ESC technology can be used.
D. OSC can be applied to a line with a single span longer than 200 km.

Correct Answer: BD
QUESTION 63
Fiber amplifiers can be classified as either                      amplifiers or non-linear fiber amplifiers. (Enter an acronym or abbreviation.)

Correct Answer: EDFA
QUESTION 64
Which of the following modulation technologies is used by a DWDM system to provide the maximum dispersion tolerance?

A. M-Z modulation
B. Electroabsorption (EA) modulation
C. Direct modulation
D. Coherent modulation

Correct Answer: D
QUESTION 65
OSC signals must be amplified by OAs before long-haul transmission.

A. TRUE
B. FALSE

Correct Answer: B
QUESTION 66
An optical transport network (OTN) consists of optical NEs connected by optical fiber links. It enables transmission, multiplexing, routing, management, supervisory, and protection of client services based on optical channels.

A. TRUE
B. FALSE

Correct Answer: A
QUESTION 67
The structures of OTUk (k= 1, 2, 3, or 4) frames at different levels are the same. A higher level indicates higher frame rate.

A. TRUE
B. FALSE

Correct Answer: A
QUESTION 68
The OTU2 interface rate is 10 Gbit/s, and the OTU4 interface rate is 400 Gbit/s.

A. TRUE
B. FALSE

Correct Answer: B
QUESTION 69
Which of the following statements about an MS-OTN system is incorrect?

A. It supports L3VPN service switching.
B. It supports ODUk service switching.
C. It supports VC service switching.
D. It supports packet service switching.

Correct Answer: A
QUESTION 70
Match the following tag attributes of Ethernet ports with corresponding function descriptions.

Select and Place:

Correct Answer:

QUESTION 71
OTN devices enable the EoS plane to provide Ethernet over SDH (EoS) services. Ethernet services can be transmitted over SDH virtual ports on SDH line boards or universal line boards.

A. TRUE
B. FALSE

Correct Answer: A
QUESTION 72
LCAS is a link capacity adjustment method in an SDH network. Which of the following statements about LCAS is incorrect?

A. LCAS does not require the use of SDH overhead bytes.
B. When LCAS is used to dynamically increase the bandwidth, services are not interrupted.
C. LCAS cannot be enabled when contiguous concatenation is bound.
D. When LCAS is used to dynamically decrease the bandwidth, services are not interrupted.

Correct Answer: A
QUESTION 73
The system control, cross-connect, and clock board of an E6616/OSN 1800 V Pro can be installed in any slot of a subrack.

A. TRUE
B. FALSE

Correct Answer: B
QUESTION 74
Which of the following statements about a T216 board is incorrect?

A. It performs O/E conversion on the received client-side services, encapsulates the services into ODUk signals, and sends the ODUk signals to the cross-connect board for grooming.
B. It decapsulates the oDuk signals from the cross-connect board into client-side services and performs E/ O conversion.
C. It supports access of 16 x 10 Gbit/s client-side services.
D. It supports wavelength-tunable colored optical modules.

Correct Answer: D
QUESTION 75
Which of the following boards can be connected to the connector shown in the following figure?

A. OTN tributary board
B. PDH board
C. EoS board
D. SDH line board

Correct Answer: D
QUESTION 76
The ROADM site is a dynamic optical add/drop multiplexer site. When a line fiber cut occurs, O8M personnel can remotely groom wavelength services on the NMS and restore services without visiting the site.

A. TRUE
B. FALSE

Correct Answer: A
QUESTION 77
FOADM sites can be classified into serial FOADM sites and parallel FOADM sites.

A. TRUE
B. FALSE

Correct Answer: A
QUESTION 78
Which of the following statements about installing an OSN 1800 V Pro/E6616 chassis are correct?

A. To install a case-shaped device in an ETSI cabinet with middle columns, you need to reassemble the mounting ears.
B. For installation in a in 19-inch cabinet, you need to determine the installation position of the chassis and install floating nuts on the mounting bars of the cabinet.
C. For installation on a wall, screws and mounting ears are directly connected to the wall. Therefore, you do not need to install ground cables.
D. To use AC power supplies, you need to turn on the AC power switch and then insert the AC power plug into the corresponding position of the chassis.

Correct Answer: AB
QUESTION 79
Which of the following statements about board installation is incorrect?

A. To install a board, you must fully open ejector levers on the board to maximize the angle between the board and the panel, and then insert the board along guide rails into the slot.
B. When installing or replacing a board, you must wear an ESD wrist strap or ESD gloves.
C. If you feel resistance when inserting a board, you can use ejector levers on both sides of the board to forcibly insert the board.
D. When installing or replacing a board, you need to remove and re-insert the filler panel in the corresponding slot. Do not remove filler panels in other slots.

Correct Answer: C
QUESTION 80
Which of the following statements about optical fiber routing are correct?

A. Do not use cable ties to bind optical fibers. Otherwise, optical fibers may be damaged.
B. The optical ports that are not connected with optical fibers do not need to be plugged with optical port plugs.
C. When routing optical fibers on site, clean the end faces of optical fibers and ports on modules.
D. Clean the internal and external fiber end faces of the ODF.

Correct Answer: ACD