Two interconnected Huawei VP terminals A and B communicate through a conference scheduled by Huawei 8650+SMC. A uses the T.140 protocol to send a banner to B. The color of the banner displayed on B is?
- A . The banner color configured on the terminal before terminal A sends
- B . Color of subtitle banner defined on MCU
- C . The color of the subtitle banner defined on the SMC management platform
- D . Banner color configured on terminal B
The FEC forward error correction algorithm is an algorithm that sends redundant data at the transmitting end, and the decoding end recovers the code stream based on the redundant data.
- A . True
- B . False
Which of the following does not belong to the video conferencing system protocol system?
- A . H.320
- B . H.323
- C . SIP
- D . 3GPP
Which of the following is not the most basic component of the H.323 protocol framework?
- A . MCU
- B . GK
- C . SMC
- D . Terminal
Regarding the relationship between auxiliary streams and audio and video, which of the following descriptions is wrong?
- A . Generally speaking, the codec protocol used by the auxiliary stream is the same as that of ordinary video.
- B . Generally speaking, the effect of auxiliary flow is worse than that of mainstream flow
- C . Auxiliary streams can also be transmitted on the mainstream channel
- D . In a multi-point video conference, the main stream can form a multi-viewer with the auxiliary stream.
The basic functions of GateKeeper defined in the ITU-TH.323 protocol do not include?
- A . Geocoding
- B . Network segment restrictions
- C . Bandwidth Management
- D . Regional management
08:08:01 ARJ sendto [(61.131.13.141:1719)] [Caller] [59512724] [(61.131.13.141:1720)] [Callee][59522000051] [[Ox0000006derr_call callee_offline]
From the above GK log, we can see that the possible reasons for the call failure are?
- A . The called person is offline
- B . The called person is busy
- C . Insufficient call bandwidth
- D . Capability negotiation failed
In the H.323 protocol system, H.225 RAS is carried on the () layer
- A . UDPfv
- B . TCP
- C . IP
- D . Data link layer
Among the following RAS messages, which one enables the gatekeeper to reject the node’s access authentication and address resolution request?
- A . GRQ
- B . RRQ
- C . URQ
- D . LRQ
The gateway in H.323 is between a circuit-switched network and a packet-switched network.
- A . True
- B . False
Which of the following is not a security mechanism of SIP?
- A . IPsec
- B . SIPS
- C . RTP
- D . Digest authentication
Cancel transaction can be used to cancel which of the following transaction?
- A . BYE transaction
- B . Invite transaction
- C . Update transaction
- D . Info transaction
Configure Huawei GK-1 and Huawei GK-2 as neighbor GKs. Terminal A and Terminal B are registered in GK-1, and Terminal C is registered in GK-2. If both GK-1 and GK-2 enable Q931 routing, and terminal A actively calls the number of terminal C and the call is successful, how many SETUP messages are used in the call process?
- A . 1 time
- B . 2 times
- C . 3 times
- D . 4 times
The terminal reads camera data through which of the following?
- A . Video cable
- B . Audio cable
- C . Control line
- D . Infrared
Regarding HD terminal auxiliary IP, which of the following statements is wrong?
- A . You don’t need to fill it in
- B . Used for terminal debugging in LAN
- C . For main business
- D . You can enter the terminal through this IP
TE60 supports multi-viewing effects up to?
- A . Double visions
- B . Three visions
- C . Four visions
- D . Five visions
Which of the following terminals does not support 8M call bandwidth?
- A . TE30
- B . TE40
- C . TE50
- D . TE60
The maximum pickup distance of VPM220 array microphone is?
- A . 3m
- B . 4m
- C . 6m
- D . 8m
Local terminals or remote terminals cannot call each other through IP addresses. Which of the following statements is incorrect?
- A . The local end is in a private network, the remote end is in a public network or another private network, and the NAT parameters are not set correctly.
- B . Failure to register GK locally or remotely
- C . Local or remote network disconnection
- D . GK registered locally or remotely is not allowed to call through IP address
VP96XX MCU supports which port allocation strategy?
- A . Fixed
- B . Dynamic automatic configuration
- C . Manual configuration
- D . None of the others
Which of the following interfaces on the MCU is the default business network port?
- A . GEO
- B . GE1
- C . FE
- D . RS232
GK’s active/standby switching is coordinated by heartbeat connections.
- A . True
- B . False
When using the MCU fence mode, the firewall in the original network needs to be modified (such as opening ports).
- A . True
- B . False
When using the MCU fence mode, the terminal on the GEO side can call the terminal on the GE1 side through IP.
- A . True
- B . False
How many E1 lines can 86 series MCU service board connect to at most?
- A . 32
- B . 48
- C . 64
- D . 128
SMC2.0 is based on the enterprise organizational structure management model. How many system users are there by default?
- A . one kind
- B . Two kinds
- C . Three kinds
- D . Four kinds
The implementation principle of the SMC2.0 configuration lock function is that the SMC regularly delivers the configuration to the terminal device, and the terminal parameters modified by the user will be restored by the SMC.
- A . True
- B . False
In the SMC2.0 system, which of the following users has the highest authority level?
- A . Conference Manager
- B . Conference Operator
- C . System administrator
- D . System debugger
All MCUs in the same service area must have the same prefix number.
- A . True
- B . False
In the recorded meeting, the network recording service records the meeting content and also supports real-time viewing of the meeting through the live broadcast client.
- A . True
- B . False
A terminal failed to register with GK and found that the rejection code of GK was gkRejGkNoEnoughRegTable. Which may be caused?
- A . When SwitchCentre defines the terminal to use password authentication, the password provided when the terminal initiates a registration request to SwitchCentre is incorrect.
- B . Network segment bandwidth restrictions are configured on SwitchCentre.
- C . Non-standard terminals register with SwitchCentre. The registration signaling is illegal and fields are missing.
- D . When the number of nodes registered on SwitchCentre has reached the value specified by the license
Network recording supports downloading recorded video files to the local in which format and supports local playback?
- A . FLV
- B . WMV
- C . RMVB
- D . MTV
The IP of a private network terminal is 10.1.0.10, the static NAT export address is 61.1.0.10, the GK address is 61.1.0.11, and there is another public network terminal: 61.1.0.12. At this time, the public network terminal calls the private network in point-to-point IP mode, which is calling address?
- A . 10.1.0.10
- B . 61.1.0.10
- C . 61.1.0.11
- D . 61.1.0.12
Under static NAT networking, the packets sent by private network terminals through the firewall will be changed. Which of the following descriptions is wrong?
- A . The terminal RAS addr changes to the address after NAT
- B . The terminal CS addr changes to the address after NAT
- C . NAT addr is the public network exit address of the firewall
- D . GK RAS addr becomes the address after NAT
During a call using the H.323 protocol, the RRQ message Payload of the calling site contains Caller RAS Addr, Caller number, and Caller CsAddr.
- A . True
- B . False
After enabling NAT settings on the video conferencing terminal, the content of the packets can be changed. It can be used in static NAT networking mode or DNAT/NAPT networking.
- A . True
- B . False
In the default configuration of the firewall, communication from a high-security network (intranet) to a low-security network (Internet) is generally not restricted, but the firewall will block it on the other hand.
- A . True
- B . False
See networking. Assume that all terminals have been registered to GK/SC, there are no port restrictions on NAT1 and NAT2, and all terminals are TE30 terminals (H.323). Then T1 calls T3. Which of the following description is correct?
- A . GK routing is required
- B . Unable to communicate with each other
- C . Can communicate directly with each other
- D . Requires MCU routing
Which is the core reason why video conferencing supports public and private network traversal?
- A . There is a firewall or NAT, so public and private network traversal must be supported.
- B . Signaling and media transmission channels are not unified
- C . There is a media transmission address in the signaling, and the NAT device only performs address translation on the IP header, so public and private network traversal processing is required.
- D . Because the network performs address translation on IP packets
The network on the TP3106 wall is connected to which port of the switch by default?
- A . 1
- B . 11
- C . 12
- D . 21
In the IP settings of the telepresence codec of the TP3106 system, the local IP should fill in the intranet address.
- A . True
- B . False
When installing the small table plate of the flip screen on TP3106, it needs to be adjusted directly by hand and cannot be powered on.
- A . True
- B . False
TP3106 three-screen telepresence calling sequence is?
- A . Left->Center->Right
- B . Center->Left->Right
- C . Center->right->left
- D . At the same time
Which of the following is a safe access method for remote maintenance of telepresence hosts?
- A . http
- B . teInet
- C . SNMP
- D . https
A multi-point conference is held on the VP9650 MCU, and the auxiliary stream adopts the "Live" mode. The MCU can distribute the video stream to all venues according to its own conference strategy.
- A . True
- B . False
The interconnection between two U1900 series unified gateways can only be achieved through SIP trunking.
- A . True
- B . False
The customer purchased two SCs, SC1 and SC2 respectively. Even if SCI is configured with one service IP and SC2 is configured with two service IPs, it will not affect the master-standby relationship between SC1 and SC2.
- A . True
- B . False
The AR router provides SIP signaling tracing function, which needs to be viewed in the diagnostic view.
- A . True
- B . False
In the SMC2.0 service area configuration, only one server prefix can be configured for each service area.
- A . True
- B . False
In video systems, image processing uses RGB color space.
- A . True
- B . False
In the SIP session service, in which of the following ways does the called terminal realize the interaction of media capabilities?
- A . In the 100trying message, the called SDP media capability is carried.
- B . In the 180 or 183 session progress, the called SDP media capability is carried
- C . The 200OK message carries the called SDP media capabilities.
- D . Acknowledge in ACK message
In a remote disaster recovery scenario, when the main node (U1981) fails, POTS user A of a branch node (the branch site device is U1911) makes an outbound call to local PSTN user B through the branch node, and the SIP signaling of the call passes through network element is?
- A . U1911-> Standby U1981->U1911
- B . Standby U1981->U1911
- C . U1911
- D . U1911->Main U1981->Standby U1981->U1911
In H.460 public-private network traversal networking, TS (traversal server) does not need to have which of the following functions?
- A . NAT
- B . GK server
- C . GW server
- D . H460.19 server
Which Huawei patented technology has been introduced in the TP3206 system based on the old version TP3106?
- A . Common optical center camera technology
- B . Remote handshake
- C . Electronic name tag
- D . Remote dinner party
In a built-in MCU terminal plus RSE network, which of the following functions can be independently implemented on the terminal without the help of SMC?
- A . Point-to-point recording conference
- B . Three-party live conference
- C . Point-to-point live conference
- D . Recording and broadcasting resource management
In the same service area, there are VP9650 MCU and VP8650 MCU (both have sufficient available resources). If the "Main MCU" parameter is configured as "Auto" on SMC2.0, which MCU will SMC use first?
- A . VP9650 MCU
- B . VP8650 MCU
- C . Random selection
- D . Choose the one with more resources among the two.
Which of the following descriptions of SIP registration is incorrect?
- A . Users need to register with the server every time they turn on their computer.
- B . When the SIP Client’s address changes, it needs to be re-registered.
- C . Registration information must be refreshed regularly. Register usually saves the registration information to the Lation Server.
- D . The function of SIP registration is to bind the AOR address to a Contact address so that the Proxy can find the calling address when making a call.
By connecting the RS-232 control interface of the HD camera and the COM port of the HD terminal through a COM port cable, the HD terminal can remotely control the pan, tilt, zoom, preset position, etc. of the camera. The length of the COM port cable is fixed and cannot be extended.
- A . True
- B . False
Direct sound refers to the sound signal that reaches the listener directly from the sound source. The meeting requirements are mainly direct sound.
- A . True
- B . False
In the H460 public-private network traversal single SC network, the H.245 TCP connection of the private network terminal is established with the TS (traversal server).
- A . True
- B . False
Packet loss retransmission ARO is similar to the TCP retransmission mechanism. When the UDP packet loss of the video code stream is detected in the network, the peer is required to resend the UDP code stream. Decoding begins when the receiving end receives the retransmitted code stream.
- A . True
- B . False
The U1911 system requires an MTU board to complete analog trunk outbound calls.
- A . True
- B . False
The built-in voice mailbox of U1960 does not include which of the following functions?
- A . Recording of voice messages
- B . Storage of voice messages
- C . Extraction of voice messages.
- D . Forwarding of voice messages
In the scenario where a private network terminal calls a public network terminal, when the logical channel is opened, the media stream will be unidirectional. The reason may be which of the following?
- A . The firewall does not open the corresponding port.
- B . The public network terminal cannot find the private network address.
- C . The terminal cannot perform master-slave determination.
- D . The terminal cannot perform capability negotiation.
During the meeting, if the remote end reports that our image is blurred and the image is normal through the local video loopback test, which of the following reasons is responsible for this phenomenon?
- A . There is a problem with remote decoding.
- B . There is a problem with the remote encoding.
- C . There is a problem with local decoding.
- D . There is a problem with local encoding
Color temperature affects the color reproduction of video images. If the color temperature is higher, what color will the image tend to be?
- A . bluish
- B . reddish
- C . Yellowish
- D . Whiter
A company has deployed a U1981 and is connected to the PSTN through a PRA trunk. If you want external users to be unable to call external users after incoming calls through this trunk, it is recommended to configure which of the following trunk outgoing call permissions is recommended?
- A . Intra-office call
- B . Local call
- C . Domestic long distance calls
- D . International long distance calls
Which of the following devices can provide a unified address book service for the video conferencing system?
- A . EUA
- B . MCU
- C . sc
- D . Terminal
In the U1900 series unified gateway, which of the following descriptions about prefixes is correct?
- A . The prefixes are divided into intra-office prefixes and outgoing prefixes.
- B . The intra-office prefix refers to the prefix used when dialing between different extensions of the same company.
- C . Since prefix 28 includes prefix 289, the system analyzes the called number according to the maximum matching principle. For calls with the called number 28901111, prefix 28 should be selected.
- D . The prefix must correspond to the office route selection code.
Which layer is the SIP protocol?
- A . Application layer
- B . Transport layer
- C . Network layer
- D . Data link layer
Which of the following descriptions about SMC2.0 service area backup is correct?
- A . SMC2.0 supports globally defining the backup sequence of service areas.
- B . Each service area has its own backup service area and priority.
- C . Define backup relationships between service areas.
- D . Multiple service areas cannot share a backup service area.
The existing venues T1 and T2T3 have venue numbers 0571001, 0571002, and 0571003 respectively. There are three MCU1, MCU2, and MCU3 with prefixes 0571, 0551, and 0755 in the same service area. Nowadays, these three venues are used on SMC to convene tripartite meetings. Which of the following statements is correct?
- A . If all three MCUs have sufficient resources, the conference will be automatically scheduled on MCU1.
- B . If all three MCUs have sufficient resources, the conference will be automatically scheduled on |MCU2.
- C . If all three MCUs have sufficient resources, the conference will be automatically scheduled on MCU3.
- D . When DSMC schedules a conference, it will first select the MCU with the most remaining resources in the same service area.
Which of the following descriptions of Adhoc meetings is incorrect?
- A . Before using an Adhoc conference, you need to create a new Adhoc conference template.
- B . When reserving an Adhoc conference, set the chairman password and conference activation password respectively.
- C . Adhoc conference does not occupy MCU resources when it is not activated.
- D . Adhoc conference is a conference method that activates the conference and joins the conference through the terminal side.
The company is now going to hold a provincial seminar, which requires City A Conference Center and City B Conference Center to join in and hold it together. Conference centers in city A often use conference template A to hold meetings, and conference centers in city B often use conference template B to hold meetings. From the perspective of feasibility and ease of operation, which of the following methods can be used to initiate a meeting?
- A . Calling call set
- B . Adhoc
- C . IVR dial-up to join the conference
- D . Multi-level meetings
Which of the following descriptions about the internal bus and hardware modules of the U1900 system is incorrect?
- A . The main function of the main control module of the U1911 system is broadband protocol analysis, calling and resource control.
- B . The U1981 system bus includes SM-BUS, PM-BUS, RS232, IP-BUS and TDM-BUS.
- C . The main functions of the U1900 system MTU module include sound playback, provision of voice venue resources, TDM to IP packet conversion, fax protocol conversion, digit collection and A/D conversion, etc.
- D . The U1960 system hardware module includes the main control module SCU, the media resource module MTU, the relay module MTU/OSU and the analog user module ASI/OSU.
The code rate calculation method of the PCM audio stream of the audio signal is the sampling rate value x sampling size value x number of channels.
- A . True
- B . False
The screen size of a tablet computer is 9 inches, and the maximum screen resolution is 1080p. What is the approximate pixel density ppi of the screen?
- A . 200
- B . 220
- C . 240
- D . 260
When SMC2.0 schedules a conference, it prompts "Insufficient IP port resources", but the MCU is online and the number of IP ports is sufficient.
Which of the following options may cause this error?
- A . There is no corresponding MCU in the service area.
- B . The license resources of SMC2.0 are insufficient.
- C . The venue protocol and rate are inconsistent.
- D . MCU is not registered to GK.
If a Huawei TE series terminal is used for point-to-point calls and the video-related configurations are set to "Auto", which of the following descriptions is correct?
- A . If the bandwidth is sufficient, 1080P60 format is preferred for the main video.
- B . If the bandwidth is sufficient, 1080P30 format is preferred for the main video.
- C . If the bandwidth is sufficient, 720P60 format is preferred for the main video.
- D . If the bandwidth is sufficient, 720P30 format is preferred for the main video.
In a multi-channel cascade, how are the multi-channel usage priorities of the upper and lower MCUs allocated?
- A . The two priorities are the same
- B . The priority of the upper-level MCU is greater than that of the lower-level MCU.
- C . The priority of the upper-level MCU is lower than that of the lower-level MCU.
- D . You can configure the priority as needed