The switch port connected to the MCU must be: LOOM half-duplex. ( )
Image format refers to the size or resolution size of the image, common image formats include, SOCIF, QCIF, CIF, ACIF, 16CIF, HD, Full HD. ( )
A CANCEL transaction can only be received after receiving an ad hoc response from INVITE (including 100 ). The final response is sent before. ( )
Wireshaik can capture packets of multiple network interface types, with the exception of wireless LAN interfaces.
If both the sender and receiver () are the same, the MCU forwards directly. (3 answers).
Stretch mode is stretched to a full screen proportional to the output, which captures part of the image. ( )
For the SDP protocol, line c contains information about the connection established for a multimedia session, which indicates the IP address used by the real media stream . ( )
In the multi-channel cascade feature, up to 32 cascaded channels between two MCUs in the same meeting.
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.
Speech enhancement technology Jitter Buffer is the use of a human intervention signal wave, to eliminate the echo signal generated during the communication process, while retaining other normal voice
signals, in order to achieve the normal communication Use. ( )
When the MCU is working in wall riding mode, GE0 is registered with switch center and GE1 can only support IP address calling.
A short message is one that can send ( ) messages to a designated venue or to all venues for inter-venue communication and information prompting. (Fill in the blanks)
Forward Error Correction FEC enables super error correction when more than 0.1% of the media stream drops within 10S are detected after the two parties have established a call. The super error
correction function will divide the call bandwidth into a part and use it to transmit redundant code streams that are anti-packet loss.
RTCP can ensure the transmission quality well through RR, and each participant who receives data must send a RR.
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. ( )
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