Network segment bandwidth limitations can cause endpoints to fail to register GKs . ( )

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.

Only one P frame is sent at the beginning of the build during the call, and the subsequent video images are encoded using I frames.

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.

The network diagnostic tool supports remote diagnostic mode, and the network diagnostic tool remotely controls another network diagnostic tool to initiate a network diagnosis and judgment against other

network diagnostic tools.

Request/response messages on reliable transports are not retransmitted.

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

Stretch mode is stretched to a full screen proportional to the output, which captures part of the image. ( )

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

In video conferencing, the empty field noise is required not to be greater than ( )dB. (Fill in the blanks)

Terminal control mainly refers to the call signaling of the terminal, the negotiation of logic channels and AV capabilities, and the signaling of conference control.

In the color ring, not only red and green are complementary colors, but everything is included within 90 degrees of the diagonal, such as yellow-green, green, blue-green three Color, both and red constitute

a complementary color relationship. ( )

H.323 During the call flow, the MCU records the registered address of the terminal.

H. 323 ALG can only be used with certain firewalls. ( )