Four metrics, color temperature, illuminance, and color rendering index, are used to measure the effect of conference room lighting, which has an impact on the rendering of video images of the conference.
Color temperature is the most common indicator of the spectral quality of a light source in Lux (1x).
During a peer-to-peer number call, H.245 performs capability set matching before opening the logical channel. ()
Banners are used to briefly display meeting content, and subtitles are used to highlight the meeting topic.
The gatekeeper rejects the access authentication, address resolution request, and gives the resolution result, which of the following signaling can achieve this function
The private network terminal does not enable NAT, and the public network terminal calls the private network terminal inside the firewall to fail, and the root cause is ( ).
In the SMC2.0 system, which of the following user rights has the highest level.
Call process signaling CALL PROCEEDING is a message sent by the caller to the called, indicating that the call is being processed.
The environment of the display area requires low illumination, and the reasons for the lower illumination required at the digital projection screen are ( ).
When 2 MCUs are cascaded, a meeting is scheduled, and the upper and lower MCU join the meeting as a virtual venue. ( )
In the H460 network, the transmission keep-alive duration, keep-alive port, and keep-alive fields are in the signaling transmission stage. ()
During a point-to-point number call, the called terminal does not send a call request to GK until it receives setup signaling.
Desktop tones can be taken as skin color adjacent to color or gray, avoiding the same color of skin tone; Desktop reflectance should be higher than skin tone, highlighting the skin image.
VR can be understood as an interactive way to guide users to a destination meeting or create a meeting. ( )
The three modes of operation of the proxy are: Call Stateful, Stateless, transaction Stateful.
The alarm light on the MCU dashboard is red and the meeting is scheduled to prompt "License resources are insufficient", possibly because of the MCU The license does not match the actual hardware
configuration of the MCU.
During a peer-to-peer number call, the terminal ends up getting the () of the peer terminal from GK and makes the call.
H.323 defines the H.323 Gateway GateKeeper, Multipoint Processor (MP), but does not define the Multipoint Conferencing Control Unit (MCU).
TCs are capability exchange requests that inform the peer of the capability information ( ).
Response messages are used to respond to request messages that indicate the status of success or failure of a call, and different types of response states are distinguished by status codes, which contain
three-digit integers, the first bit of the status code Used to define the response type, the other two digits are used to further explain the response in more detail. ( )
Color rendering index refers to the object with the light source illumination and with a standard light source illumination, the degree of its color compliance of the degree of measurement, the smaller the
value indicates the higher degree of conformity. ( )
1080P or 720P 50/60fps is a full-frame image of 50 frames per second or 60 frames progressively, rather than an interlaced image of 50/60 fields.
Remote audio loopback, from audio input, encoding, transmission through the network to the remote end and then forwarded back, the main test network connection is normal.
The Network Diagnostic Tool supports initiating diagnostic tests from the Public Network to the Private Network Diagnostic Tool.
ALG (Application Layer Gateway) is a monitoring application protocol that modifies the content of the message and opens the corresponding ports.
supports up to 1080I dual-stream, which is the industry's highest dual-stream processing capability.
The gateway in 502.H. 323 is between a circuit-switched network and a packet-switched network. ( )
In the form of broadcasting, all ports can receive each data sent. Users can connect to this device and use packet capture tools such as Wireshark to grab packets sent to the device on the network and packets sent by the device to the network.
In the meeting room design, it is recommended to use a light-colored tablecloth to reflect astigmatism to give the participants a good amount of light on their faces (jaws).
The basic concept of white balance technology is that "white objects can be reduced to white regardless of any light source", which is a case for color casts that occur when shooting under a specific light
source Compensation is made by reinforcing the corresponding complementary colors. ( )
The H460 protocol specifies that the H.323 media streaming portion of the public-private network traversal processing process is
Static NAT converts a private address into an Internet address, and it is many-to-many, and there is no guarantee that a private address will be converted to a public address.
The terminal auxiliary IP is designed so that users can log in to the terminal configuration or debugging in the LAN, which can be used for main business. ( )
To use NLOG properly, the FLASH plug-in must be installed or it cannot be used.
The role of RTP in VoIP mainly includes: real-time transmission of media information, elimination of jitter, card performance, prevention of packet loss, in a certain situation can be transmitted DTMF signals,
tones and signaling.
GK supports the resolution of the called number to the neighbor GK when the called node belongs to the neighbor GK area based on the called number.
An MCU can belong to only one service area, but a service area can have multiple MCUs.
SIP is an application layer protocol that is independent of the transport layer protocols below and can be hosted on different transport protocols, such as UDP/TCP/TLS/SCTP, currently Most commonly used
TCP. ( )
When using MCU wall riding mode, the terminal on the GE0 side can call the terminal on the GE1 side over IP.
H.264 video divides the image into three types of frames: I, P, and B, with I frames encoded between frames and P frames encoded in-frame.
Protocol is a firewall/NAT traversal standard approved by the ITU of the International Telecommunication Union, which two protocols are mainly composed?
When using the MCU wall riding mode, there is no need to add other devices traversed by public and private networks. ( )
Which of the following RSE6500 ether ports is the one that provides recording and broadcasting services?
When using the MCU wall riding mode, you need to modify the firewall in the original network (such as open ports).
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).
The 598.Q.931 protocol is the protocol used for information exchange between the gateway and the gatekeeper, and is primarily responsible for signaling processing during the call.
The feed can only be displayed on the same monitor as the mainstream, not independently.
When GK agrees to a terminal's registration request, which of the following response messages is sent?
Video compression includes intra-frame compression (1 frame) and inter-frame compression (P frame), common H.26X, MPEG-2, MPEG-4 Both support in-frame/inter-frame compression.
H.460 In the media streaming interconnection scheme, the preservation package is created by which of the protocols listed below ( ).
The 310.H.460 protocol specifies that the public-private network traversal of the signaling portion is handled by ( ).
The private network terminal calls the public network terminal, and when the logical channel is opened, the reason for the occurrence of a single pass of media streaming is ( ).
The INFORMATION that the IP header in the SETUP message does not contain Is there? ( )
For the SDP protocol, line 0 contains parameters related to the session owner, where the first parameter is represented. ( )
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TESTED 21 Nov 2024
