Manual

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Firmware User’s Manual V6.09.45
39
Multicast Setting allows users to configure the IP addresses and ports for multicast video and
audio (supported models only) streams. Multicast is a protocol where a data stream is sent only
once and shared to requesting devices. This in turn saves network bandwidth. However, to use
this feature, network devices, such as routers and switches, should support IP multicast.
Parameters
Description
Stream 1
Refers to the video stream 1.
Stream 2
Refers to the video stream 2.
Audio
Refers to the audio stream.
NOTE: Appears only if the camera model supports audio input/output.
By Request
When checked, the video or audio stream will be streamed only to a
particular receiver when that receiver sends a request or in the case of the
Network Video Recorder (NVR), selects to view or record the stream. If
unchecked, the video or audio stream will constantly be streamed to the
network whether there are devices viewing the video or not.
To save on network bandwidth, it is recommended to check this function.
Multicast IP
Set the multicast IP of the corresponding stream.
Network Port
Enter the assigned port for the corresponding stream.
Multicast TTL
Enter the multicast TTL (time-to-live) of the corresponding stream. This
value determines the time span (in seconds) when the packet is retained
in the network. When the time expires and no request is received, the
packet is then discarded.
After changing any of the items above, press Apply to save the changes. The Reset button
undoes the changes that had just been made but not Applied yet. New port settings will only take
effect after pressing System -> Save & Reboot.