TCs are capability exchange requests that inform the peer of the capability information ( ).
Huawei's video product fault location method can be mainly summarized as, grain and grass first, follow the vine to touch the melon, step by step, bold and careful, and pass on the torch. ( )
During the MCU main control board backup reversal process, the conference and venue status on the SMC will be offline for about 10 seconds.
The sound test is to test whether the terminal audio output is correct.
In the multi-channel cascade feature, up to 32 cascaded channels between two MCUs in the same meeting.
H.323 can only be applied on IP networks.
Multi-channel cascading, mainly through the establishment of multiple cascaded channels between the cascading conferences of the MCU, the multi-channel code stream on the MCU is sent to the peer
MCU.
When using MCU wall riding mode, the terminal on the GE0 side can call the terminal on the GE1 side over IP.
Cascade channels are used by priority, and resources are mutually exclusive when at the same priority.
The packet loss rate recorded by NLOG does not include packet loss from data devices on the line.
The FEC forward error correction algorithm is an algorithm that sends redundant data at the sending end and recovers the code stream based on the redundant data at the decoding end.
As Huawei's video service management platform, SMC platform manages and schedules video conferencing in a unified manner. It can realize all the meeting control operations in the video conference, and can provide customers with a convenient and fast conference management experience.
Any color at the opposite end of the diameter of the color ring is called a complementary color. ( )
RAS messages are a type of message specified in the H.225.0 protocol, which is a protocol used between nodes and gateways to perform management functions, mainly including registration, access
control, and status.
The RTCP protocol can be freely controlled by SDES grouping, with RTCP SDES marking members away from the session, or members changing SSRC.
Color temperature affects the white balance of the camera, and where the color temperature is complex, the image can be cast.
The key point of signaling packet analysis is to be familiar with the flow of signaling, and when problems are found, focus on which signaling packages should be in the signaling process, and filter irrelevant
data. The grab packet didn't catch which messages should have. ( )
An MCU can belong to only one service area, but a service area can have multiple MCUs.
Where the illumination is not enough, the image noise is low, and the image is dark.
RTP is a real-time transmission control protocol: on a network service of multicast (multicast) or unicast (unicast). Provides end-to-end network transmission capabilities for applications to transmit real-time
data such as audio, video or simulation data.
There are ways to join an IVR meeting at a venue. (Fill in the blanks)
In the Cilent/Server model, the primary function of request proxy server is to decide where to send signaling messages.
In the MCU's web page, the format of the exported address book information is ( ). (Fill in the blanks)
Extended request message UPDATE , which is used to modify session properties during the call setup phase. ( )
The secondary stream can only be displayed on one display with the mainstream, not independently.
Master-slave decisions are mainly used to prevent both parties from triggering the same unsharable event or resource at the same time during communication, so a master party needs to be identified in
advance. When a conflict occurs, the slave shall act at the discretion of the master.
In multimedia services, RTP is used for real-time datagram transmission and RTCP is used to detect the quality of service for an RTP session.
All MCUs under the same service area must have the same prefix number.
Background tones take complementary colors of skin tones, avoid large areas of skin color proximity or similar colors; Generally use blue, gray, blue-gray combination and other shades; The background
image of the large line uses the simplicity and clarity of the picture.
H.323 is used to provide multimedia services in packet-switched networks. ( )
If the meeting scheduled by the user is not held on time, which of the following measures can be taken to solve this problem?
In MCU odd wall mode, you can configure IP routing to specify that IP routes send and receive data through GE1.
Which of the following is not a disadvantage of forward error correction?
What are the main management functions performed by RAS?
How many ways can A venue join an IVK meeting?
Which of the following protocol messages does Wireshark support decoding?
Adhoc Conferencing is a conferencing mode that allows you to create and join a meeting on the terminal side without an administrator.
PCM coding mainly includes three processes: sampling, quantization, and coding.
Video IVR, on the basis of audio IVR, adds a video interactive interface, which can more easily and intuitively guide users to join a conference or create a conference on the terminal side. ()
The RTP protocol provides both real-time transmission capabilities and service quality assurance mechanisms.
In the process of processing the video signal of the video terminal, the chip is responsible for encoding and compression. (Please fill in the English abbreviations).
The following description of the relationship between the RTCP port number and the RTP port number is correct ().
In any viewing mode, the venue can be viewed at any other venue.
The built-in veb of the MCU can also manage other MCUs in addition to this MCU
What are some of the following ways to create a video IVR meeting?
When 2 MCUs are cascaded, a meeting is scheduled, and the upper and lower MCU join the meeting as a virtual venue. ( )
The protocol can be used for public-private network traversal of devices that support the H.323 protocol. (Please fill in the type of agreement).
RFC2190 defines a total of three formats of load heads for the H.263 video codec format: mode A, mode B, and mode C.
Which of the following RSE6500 ether ports is the one that provides recording and broadcasting services?
As shown in the following figure, when the user presses the "+", "-" or arrow keys in the camera control interface of the terminal, he finds that the camera at this end does not respond, which of the following is not the possible cause of the problem
is the unified identity used by the recording server to register with the SIP server and needs to be consistent with the configuration on SMC2.0. (Abbreviations).
The chromatic aberration (YPbPr) output supports both 16:9 and 4:3
When two parties have a video conferencing call, a voice stream and a video stream are generated, where the RIP stream contains the voice stream and the RTCP stream contains the video stream.
PCM coding mainly includes three processes: sampling, quantization, and coding. ()
defines the load head RTP load head structure for the A/B/C3 mode as ( ) mode.
Web recording can record audio and video output from any venue in a video conference (voice, SD/HD/Zhizhen) and play it back on demand via Webcast.
What is the range of empty field noise requirements in the acoustic key indicators?
mode, communication between public and private network devices is supported, and data does not need to go through a firewall.
The TO tag, the From tag, and the Call-ID together define the peering SIP relationship between UAC and UAS, called a dialog (Dialog)
The role of the RTP protocol is ().
The IP header in the ACF message does not contain any of the following information ( ).
At the UDP layer, H.323 protocols fall into three broad categories, where the functions of the terminal control class are not included. ( )
At what protocol layer does NAT primarily work? ( )
WEB When managing must, in the Export item under the device management interface, the following cannot be exported. ( )
In video conferencing, in order to improve the quality of speech, we can add some voice enhancement technology, such as ( ).
Which of the following features does the gatekeeper provide (3 answers).
H.225 contains which of the following signalings ( ).
Under static NAT networking, the signaling description of the public network terminal called the private network terminal is correctly (). (3 answers).
From the logs captured above, you can see the reason for the call failure. ( )
Of the six basic request messages, ( ) are used to query the server capabilities
The advantages of static NAT include. ( )
H.225 contains which of the following signalings (). (2 answers).
The main role of the 317.H.245 protocol is ( ).
Loudness indicates the strength of the sound, ( ) determines the size of the loudness.
Among the four elements of packet filtering that can generally be omitted by firewalls, the condition is. ( )
The SIP protocol is a ( ) protocol.
In the RTP specification (RFC3550), a total of ( ) types of RTCP reports are defined to report current control information.
53.H.460 Networking, the RTP keep alive stream is ( ).
Which of the following descriptions of SIP registrations is incorrect. ( )
H.460 Signaling interoperability scheme ( ).
For the SDP protocol, line 0 contains parameters related to the session owner, where the first parameter is represented. ( )
H.460 In networking, the communication between the terminal and the clientGK follows the protocol ( ).
Zone management is implemented by which of the following system modules ( ).
The following description of the H.323 call flow is correct
In video conferencing, local noise is required not to be greater than ( ).
By default, the terminal reports the packet loss rate to the MCU once per ( ).
Incorrect description about recording server (CR101/CR102 ) is ( ).
Which of the following messages is used for endpoint registration ( ).
In multi-channel cascading, the upper and lower MCU multichannels use the preference of ( ).