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NEW QUESTION 299
The terminal recording request will be sent to the MCU, and then the MCU will uniformly record and broadcast the operation.
- A. True
- B. False
Answer: B
NEW QUESTION 300
Common SIP calls to the SDP negotiation process include ( ).
- A. Both Invite/Relnvite and Final Response (2xx) have an SDP response
- B. Invite with SDP, reliable lxx response with SDP, and final 2xx response without SDP
- C. None with SDP
- D. Invite with SDP, then 2xx response with SDP
Answer: A,B,D
NEW QUESTION 301
There are ways to join an IVR meeting at a venue. (Fill in the blanks)
Answer:
Explanation:
3
NEW QUESTION 302
In the Early state, dialog can be terminated by (). (3 answers).
- A. The caller sends CANCLE
- B. The caller sends a BYE
- C. Called to send BYE
- D. Called Failure Response
Answer: A,B,D
NEW QUESTION 303
RTP runs on top of ( ) and each RTP message is encapsulated in a ( ) datagram.
- A. OTCP , TCP
- B. OUDP , TCP
- C. OTCP , UDP
- D. UDP. UDP
Answer: D
NEW QUESTION 304
Illuminance is based on the luminous flux received by the vertical surface as the standard, and if oblique illumination is used, the illuminance decreases. ( )
- A. False
- B. True
Answer: B
NEW QUESTION 305
During the terminal registration GK phase, the UDP header in the RRQ registration request message contains the following information ( ).
- A. GK RAS addr
- B. Caller RAS addr
- C. Caller CS addr
- D. Caller Number
Answer: A,B
NEW QUESTION 306
A firewall is one that protects a network from attacks by "untrusted" networks, but at the same time must also allow legitimate communication between two networks
- A. False
- B. True
Answer: B
NEW QUESTION 307
The frequency response capacity of nature that the human ear can perceive can reach 20Hz-20KHz, using audio standards such as G.711, G.722, G.728, and the audio width is only available 50Hz-7KHz, so use AAC-LD method to solve this problem in high-definition video communication.
- A. False
- B. True
Answer: B
NEW QUESTION 308
The following socket on the MCU is the default service network port. ()
- A. GE0
- B. RS232
- C. GE1
- D. FE
Answer: A
NEW QUESTION 309
Which of the following layers does RAS host?
- A. UDP
- B. IP
- C. TCP
- D. Data Link Layer
Answer: C
NEW QUESTION 310
In the networking, in which stage of signaling transmission occurs, such as the transmission keep-alive duration, keep-alive port, and keep-alive fields?
- A. OLC message In the
- B. ACF message in the
- C. IIR message
- D. ARQ message in the
Answer: A
NEW QUESTION 311
Direct sound refers to the sound signal that reaches the listener directly from the sound source, and the meeting requirements are mainly direct sound.
- A. False
- B. True
Answer: B
NEW QUESTION 312
H.460 In the media streaming interconnection scheme, the preservation package is created by which of the protocols listed below ( ).
- A. H.460.18
- B. H.255.0
- C. Q.931
- D. H.460.19
Answer: D
NEW QUESTION 313
The function of the redirect server is to map the addresses in the request to zero or more new addresses, which are returned to the client.
- A. False
- B. True
Answer: B
NEW QUESTION 314
A session-independent nature is that a SIP-URL represents a resource or user that needs to be accessed, and the message body can carry anything.
- A. False
- B. True
Answer: B
NEW QUESTION 315
In the registration signaling process, the terminal initiates to GK which of the following messages represents a registration request ( ).
- A. RCF
- B. MSD
- C. RRJ
- D. RRQ
Answer: D
NEW QUESTION 316
Which of the following measures can users use to expand the video port of the VP9650 ?
- A. Added media board answer in slot #1
- B. Added ISDN line card in slot #2
- C. Added ECCA line card in slot 2
- D. Added media board in slot 3
Answer: D
NEW QUESTION 317
53.H.460 Networking, the RTP keep alive stream is ( ).
- A. of the private network terminal Sent by private endpoints to Ts
- B. Sent from a private network terminal to a public network terminal
- C. Answer sent to Ts by the public network terminal
- D. The public network terminal is sent to the
Answer: B
NEW QUESTION 318
The compression encoding of audio signals can be divided into ( ).
- A. Parameter encoding
- B. Predictive Coding
- C. Waveform encoding
- D. Mixed encoding
Answer: A,C,D
NEW QUESTION 319
Of the six basic request messages, ( ) is used to end the callback.
- A. ACK
- B. INVITE
- C. CANCEL
- D. BYE
Answer: D
NEW QUESTION 320
If the meeting scheduled by the user is not held on time, which of the following measures can be taken to solve this problem?
- A. Check the GK registration of the endpoint and MCU
- B. Check and modify the device system time
- C. on the MCU's web interface Check and modify the terminal time
- D. Change the service area answer for the MCU
Answer: A
NEW QUESTION 321
Voice enhancement technology, automatic noise suppression ANR can solve the problem of the overall low or high call volume in the line.
- A. True
- B. False
Answer: B
NEW QUESTION 322
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