QUESTION: 41

In the VoIP system, what are the factors that affect the quality of voice calls? (multiple choice)

Jitter
delay
Packet loss
bandwidth

Answer(s): A,B,C,D

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QUESTION: 42

All MCUs under the same service area must have the same prefix number. Right or Wrong?

Right
Wrong

Answer(s): B

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QUESTION: 43

Huawei TE series terminals make point-to-point calls, and the video-related settings are all "automatic". From the following statement which ones are correct? (multiple choice)

In the case of sufficient bandwidth, the main video is given priority to the 1080P60 format.
In the case of sufficient bandwidth, the main video is given priority to the 1080P30 format
In the case of sufficient bandwidth, 720P60 format is preferred for the main video
In the case of sufficient bandwidth, 720P30 format is preferred for the main video

Answer(s): A,B,D

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The U1900 system is connected to the PSTN through a digital trunk. In U1900, phone A cannot call user B's On mobile phone, user B can call back phone A normally. Which of the following reasons may cause this failure? (single choice)

The digital trunk connection between U1900 and PSTN is faulty.
Phone A is not registered properly.
Phone A outbound call permission restriction
Phone A has been added to the system's blacklist of called parties

Answer(s): C

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QUESTION: 41

QUESTION: 42

QUESTION: 43

QUESTION: 44

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