The role of the LAN2 port of the HD terminal ().

In the Contirmed state, both the caller and the caller can end dialog through ByE. ( )

Which of the following video resolutions meet the 16:9 aspect ratio requirement?

Due to the size of the display and the resource limitations of the MCU , the number of multi-screen sprites generally does not exceed 24 , otherwise the image is too small and the picture will not be clear.

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 ( ).